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
Korean numerals tensed consonants when possible. Thus for example: Several numerals have long vowels, namely (two), (three) and (four), but these become short when combined with other numerals / nouns (such as in twelve, thirteen, fourteen and so on). The usual liaison and consonant-tensing rules apply, so for example, "yesun-yeoseot" (sixty-six) is pronounced like ("yesun-nyeoseot") and "chil-sip" (seventy) is pronounced like "chil-ssip". "Beon" (), "ho" (), "cha" (), and "hoe" () are always used with Sino-Korean or Arabic ordinal numerals. For example, "Yihoseon" () is Line Number Two in a metropolitan subway system. "Samsipchilbeongukdo" () is highway number 37. They cannot be