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
Latin numerals (linguistics) Latin numerals (linguistics) The Latin numerals are the words used to denote numbers within the Latin language. They are essentially based on their Proto-Indo-European ancestors, and the Latin cardinal numbers are largely sustained in the Romance Languages. In Antiquity and during the Middle Ages they were usually represented by Roman Numerals in writing. The Latin language had several different sets of numerals used for various purposes. Some of those sets are shown in the tables below. The cardinal numerals are the ordinary numbers used for counting ordinary nouns ('one', 'two', 'three' and so on). The numbers "ūnus", "duo", "trēs" and