65 (sixty-five) is the natural number following 64 and preceding 66. In mathematics, a natural number can mean either an element of the set {1, 2, 3, ...} (i. ... 64 (sixty-four) is the natural number following 63 and preceding 65. ... 66 is the natural number following 65 and preceding 67. ...

← 60 61 62 63 64 65 66 67 68 69 → 59 (fifty-nine) is the natural number following 58 and preceding 60. ... 60 (sixty) is the natural number following 59 and preceding 61. ... 61 (sixty-one) is the natural number following 60 and preceding 62. ... 62 (sixty-two) is a natural number following 61 and preceding 63. ... Sixty-three is a natural number following 62 and preceding 64. ... 64 (sixty-four) is the natural number following 63 and preceding 65. ... 66 is the natural number following 65 and preceding 67. ... 67 (sixty-seven) is the natural number following 66 and preceding 68. ... 68 (sixty-eight) is the natural number following 67 and preceding 69 // Sixty-eight is a nontotient. ... 69 (sixty-nine) is the natural number following 68 and preceding 70. ... Look up seventy in Wiktionary, the free dictionary. ... List of numbers — Integers This is a list of articles about numbers (not about numerals). ... The integers are commonly denoted by the above symbol. ... 0 10 20 30 40 50 60 70 80 90 → 0 (zero) is both a number and a numerical digit used to represent that number in numerals. ... 10 (ten) is an even natural number following 9 and preceding 11. ... 20 (twenty) is the natural number following 19 and preceding 21. ... 30 (thirty) is the natural number following 29 and preceding 31. ... 40 (forty) is the natural number following 39 and preceding 41. ... 50 (fifty) is the number following 49 and preceding 51. ... 60 (sixty) is the natural number following 59 and preceding 61. ... Look up seventy in Wiktionary, the free dictionary. ... 80 (eighty) is the natural number following 79 and preceding 81. ... 90 (ninety) is the natural number preceded by 89 and followed by 91. ... 100 (one hundred) (the Roman numeral is C for centum) is the natural number following 99 and preceding 101. ...
Cardinal	65 sixty-five
Ordinal	65th sixty-fifth
Factorization
Divisors	1, 5, 13, 65
Roman numeral	LXV
Binary	1000001
Hexadecimal	41

Aleph-0, the smallest infinite cardinal In mathematics, cardinal numbers, or cardinals for short, are a generalized kind of number used to denote the size of a set. ... Commonly, ordinal numbers, or ordinals for short, are numbers used to denote the position in an ordered sequence: first, second, third, fourth, etc. ... In mathematics, factorization or factoring is the decomposition of an object (for example, a number, a polynomial, or a matrix) into a product of other objects, or factors, which when multiplied together give the original. ... In mathematics, a divisor of an integer n, also called a factor of n, is an integer which evenly divides n without leaving a remainder. ... The system of Roman numerals is a numeral system originating in ancient Rome, and was adapted from Etruscan numerals. ... The binary numeral system, or base-2 number system, is a numeral system that represents numeric values using two symbols, usually 0 and 1. ... In mathematics and computer science, hexadecimal, base-16, or simply hex, is a numeral system with a radix, or base, of 16, usually written using the symbols 0–9 and A–F, or a–f. ...

In mathematics

Sixty-five is an octagonal number. It is also a Cullen number. Given 65, the Mertens function returns 0. An octagonal number is a figurate number that represents an octagon. ... In mathematics, a Cullen number is a natural number of the form n · 2n + 1 (written Cn). ... In number theory, the Mertens function is where μ(k) is the Möbius function. ... 0 (zero) is both a number and a numerical digit used to represent that number in numerals. ...

This number is the magic constant of 5 by 5 normal magic square: The magic constant of a magic square, an n-by-n matrix, is defined such that the sum of any row, column or main diagonal yields the same result, denoted M2(n). ... It has been suggested that Date magic square be merged into this article or section. ...

This number is also the magic constant of n-Queens Problem for n = 5. The magic constant of a magic square, an n-by-n matrix, is defined such that the sum of any row, column or main diagonal yields the same result, denoted M2(n). ... One possible solution The eight queens puzzle is the problem of putting eight chess queens on an 8×8 chessboard such that none of them is able to capture any other using the standard chess queens moves. ...

65 can be expressed as a sum of two squares in two ways, 65 = 8² + 1² = 7² + 4².

It appears in the Padovan sequence, preceded by the terms 28, 37, 49 (it is the sum of the first two of these). The Padovan sequence is the sequence of integers P(n) defined by the initial values and the recurrence relation The first few values of P(n) are 1, 1, 1, 2, 2, 3, 4, 5, 7, 9, 12, 16, 21, 28, 37, 49, 65, 86, 144, 151, 200. ...

There are only 65 known Euler's idoneal numbers.

In science

• The atomic number of terbium, a lanthanide

It has been suggested that List of elements by atomic number be merged into this article or section. ... General Name, Symbol, Number terbium, Tb, 65 Chemical series lanthanides Group, Period, Block n/a, 6, f Appearance silvery white Atomic mass 158. ...

Astronomy

• Messier object M65, a magnitude 10.5 galaxy in the constellation Leo

• The New General Catalogue object NGC 65, a spiral galaxy in the constellation Cetus

• The Saros number of the solar eclipse series which began on -749 April 24 and ended on 513 May 20. The duration of Saros series 65 was 1262.1 years, and it contained 71 solar eclipses.

• The Saros number of the lunar eclipse series which began on -736 August 11 and ended on 797 February 16. The duration of Saros series 65 was 1532.5 years, and it contained 86 lunar eclipses.

The Messier objects are a set of astronomical objects catalogued by Charles Messier in his catalogue of Nebulae and Star Clusters first published in 1774. ... M65 refers to: Messier 65 a Messier object and a spiral galaxy in the Leo constellation. ... The apparent magnitude (m) of a star, planet or other heavenly body is a measure of its apparent brightness; that is, the amount of light received from the object. ... NGC 4414, a typical spiral galaxy in the constellation Coma Berenices, is about 17,000 parsecs in diameter and approximately 20 million parsecs distant. ... This article or section does not adequately cite its references or sources. ... Leo (IPA: , Latin: , symbol , ) is a constellation of the zodiac. ... The New General Catalogue (NGC) is the most well-known catalogue of deep sky objects in amateur astronomy. ... An example of a spiral galaxy, the Pinwheel Galaxy (also known as Messier 101 or NGC 5457) A spiral galaxy is a type of galaxy in the Hubble sequence which is characterized by the following physical properties: A considerable total angular momentum Composed of a central bulge surrounded by a... Cetus (a name from Greek mythology, referring to a Whale or Sea monster, see Ceto) is a constellation of the southern sky, in the region known as the Water, near other watery constellations like Aquarius, Pisces, and Eridanus. ... A Saros cycle is a period of 6585 + 1/3 days (approximately 18 years 10 days and 8 hours) which can be used to predict eclipses of the sun and the moon. ... Photo taken during the 1999 eclipse. ... April 24 is the 114th day of the year in the Gregorian calendar (115th in leap years). ... Events Births Deaths Categories: 513 ... May 20 is the 140th day of the year in the Gregorian calendar (141st in leap years). ... Time lapse movie of the 3 March 2007 lunar eclipse A lunar eclipse occurs whenever the Moon passes through some portion of the Earths shadow. ... August 11 is the 223rd day of the year (224th in leap years) in the Gregorian calendar. ... Events July 17 - Irene orders her son, the Byzantine emperor Constantine VI captured and deposed August 15 - Irenes orders are accomplished; her son is blinded, and herself declared emperor the next day. ... February 16 is the 47th day of the year in the Gregorian calendar. ...

In other fields

Sixty-five is:

• A common speed limit, in miles per hour, for freeways in many U.S. states, primarily in the eastern United States (in the western United States, the common limit is 70 and in some places 75)
• The designation of Interstate 65, a freeway that runs from Alabama to Indiana
• The code for international direct dial phone calls to Singapore
• The traditional age for retirement in the United Kingdom, Germany and other countries. It was previously the age at which a person in the United States could retire with full Social Security benefits; however, recent changes in the law have increased this age for younger workers due to improvements in life expectancy
• The registry of the U.S. Navy's nuclear aircraft carrier USS Enterprise (CVN-65)
• 65 is the minimum grade required to pass an exam, or class, in many areas
• Paul Davis had a hit song "65 Love Affair" in 1982
• Sammy Hagar re-recorded his hit "I Can't Drive 55" in 2001 for NBC's NASCAR broadcasts to reflect higher speed limits. The song was used from 2001 until 2004 to introduce Budweiser Pole Award winners on NBC and TNT broadcasts.
• 65 is a commonly used abbreviation for the Sheffield, UK, post-rock band 65daysofstatic.
• The setting of "Naked City" (1958 - 63) was New York's 65th Precinct
• In terms of numerology, 65 is the sum of the supposed mystical and cosmic number 23 and the Ultimate Answer of Life, the Universe and Everything, 42.

A road speed limit is the maximum speed allowed by law for road vehicles. ... Motto: (Out Of Many, One) (traditional) In God We Trust (1956 to date) Anthem: The Star-Spangled Banner Capital Washington D.C. Largest city New York City None at federal level (English de facto) Government Federal constitutional republic  - President George Walker Bush (R)  - Vice President Dick Cheney (R) Independence from... Interstate 65 (abbreviated I-65) is an Interstate Highway in the United States. ... Official language(s) English Capital Montgomery Largest city Birmingham Area  Ranked 30th  - Total 52,419 sq mi (135,765 km²)  - Width 190 miles (306 km)  - Length 330 miles (531 km)  - % water 3. ... This article is about the U.S. State. ... This is a list of country calling codes, also known as international direct dialing (IDD) codes, which are needed to access international telephone services. ... Retirement is the point where a person stops employment. ... Social Security, in the United States, currently refers to the Federal Old-Age, Survivors, and Disability Insurance (OASDI) program. ... Enterprise Logo The supercarrier, USS Enterprise (CVN-65), formerly CVA(N)-65, is the worlds first nuclear-powered aircraft carrier and the eighth U.S. Naval vessel to bear the name. ... Paul L. Davis (born April 21, 1948 in Meridian, Mississippi) is an American singer, best known for his radio hits which spanned from his first single in 1970 into the early 1980s. ... 65 Love Affair was a song, performed by Paul Davis for the Cool Night album. ... This article or section does not adequately cite its references or sources. ... For other uses, see Sheffield (disambiguation). ... The term post-rock was coined by Simon Reynolds in issue 123 of The Wire (May 1994) to describe a sort of music using rock instrumentation for non-rock purposes, using guitars as facilitators of timbres and textures rather than riffs and powerchords. ... 65daysofstatic (also known by the abbreviations 65dos and 65days) are an instrumental math rock and post-rock band from Sheffield, England. ... Naked City was a television series which aired from 1958 to 1963 on the ABC television network. ... Events Rome Greek geographer Strabo publishes Geography, a work covering the world known to the Romans and Greeks at the time of Emperor Augustus - it is the only such book to survive from the ancient world. ... Life, the Universe and Everything (1982, ISBN 0-345-39182-9) is the third book in the five-volume Hitchhikers Guide to the Galaxy science fiction series by Douglas Adams. ... This article is about the year 42. ...

In sports

• NCAA Men's basketball tournament includes 65 college teams
• NFL Houston Oilers Elvin Bethea wore uniform #65
• MLB Texas Rangers first baseman Nate Gold wears uniform 65

The National Collegiate Athletic Association (NCAA, often said NC-Double-A) is a voluntary association of about 1200 institutions, conferences, organizations and individuals that organizes the athletics programs of many colleges and universities in the United States. ... NFL logo For other uses of the abbreviation NFL, see NFL (disambiguation). ... City New Orleans, Louisiana Team colors Old Gold, Black, and White Head Coach Sean Payton Owner Tom Benson General manager Mickey Loomis Mascot Gumbo League/Conference affiliations National Football League (1967–present) Eastern Conference (1967-1969) Capitol Division (1967; 1969) Century Division (1968) National Football Conference (1970-present) NFC West... Elvin Lamont Bethea (born March 1, 1946, Trenton, New Jersey) is a former American football defensive end who played his entire career with the Houston Oilers. ... Major League Baseball (MLB) is the highest level of play in professional baseball in North America. ... Major league affiliations American League (1961–present) West Division (1972–present) Current uniform Retired Numbers 26,34,42 Name Texas Rangers (1972–present) Washington Senators (1961-1971) Ballpark Ameriquest Field in Arlington (1994–present) a. ...

Historical years

65 A.D., 65 B.C., 1965, 2065, etc. Headline text Events By place Roman Empire Gaius Calpurnius Piso conspires against Roman emperor Nero. ... Centuries: 2nd century BC - 1st century BC - 1st century Decades: 110s BC 100s BC 90s BC 80s BC 70s BC - 60s BC - 50s BC 40s BC 30s BC 20s BC 10s BC Years: 70 BC 69 BC 68 BC 67 BC 66 BC 65 BC 64 BC 63 BC 62... 1965 (MCMLXV) was a common year starting on Friday (the link is to a full 1965 calendar). ... (Redirected from 2065) Millennia: 2nd millennium - 3rd millennium - 4th millennium Centuries: 20th century - 21st century - 22nd century Decades: 2010s 2020s 2030s 2040s 2050s - 2060s - 2070s 2080s 2090s Years: 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 The Decade as a Whole This decade is expected to be called...