This horizontal stroke is, however, important to distinguish the glyph for seven from the glyph for one in writings that use a long upstroke in the glyph for one.
The Seven Sages of Greece: Solon, Chilon, Thales, Bias, Cleobulus, Pittacus and Periander.
The aliquots of 220 are 1, 2, 4, 5, 10, 11, 20, 22, 44, 55 and 110--the sum of which is 284; and the aliquots of 284 are 1, 2, 4, 71 and 142--the sum of which is 220.
There are seven ages in the life of man, and the seventh son of a seventh son is though to possess special mystical powers.
In Egyptian legend, seven is sacred to Osiris and there are the Seven Hothors who serve as fairy godmothers and predict a newborn's fate or bestow certain aspects of that fate upon them.