Sossos

February 1984, Jöran Friberg, "Numbers and Measures in the Earliest Written Records." Scientific American, volume 250, number 2, page 110. There in about 340 B.C. the founder of a school of astrology, a Babylonian named Berossos, wrote a history of his homeland. In it he told his Greek readers that the numbers sossos (60), neros (600) and saros (3,600) occupied a special place in Babylonian arithmetic and astronomy.

Berossos used in his accounts saroi, neroi, and sossoi. A saros is a unit of time that consists of 3,600 years, a neros of 600 years, and a sossos of 60 years