666 (number) on 1/149 in base 10 has a magic total of 666. The prime factorization of 666 is 2 • 3 • 37. Also, 666 is the sum of squares of first seven primes: formula_2 The Roman numeral for 666, DCLXVI, has exactly one occurrence of all symbols whose value is less than 1000 in decreasing order (D = 500, C = 100, L = 50, X = 10, V = 5, I = 1). In the Textus Receptus manuscripts of the New Testament, the Book of Revelation () cryptically asserts 666 to be "man's number" or "the number of a
Chinese numerals system of rod numerals. In this system, horizontal rod numbers are used for the tens, thousands, hundred thousands etc. It's written in "Sunzi Suanjing" that "one is vertical, ten is horizontal". The counting rod numerals system has place value and decimal numerals for computation, and was used widely by Chinese merchants, mathematicians and astronomers from the Han dynasty to the 16th century. In AD 690, Empress Wǔ promulgated Zetian characters, one of which was "〇". The word is now used as a synonym for the number zero. Alexander Wylie, Christian missionary to China, in 1853 already refuted the notion that