The Number of the Beast is described in the Book of Revelation 13:17–18. In the Textus Receptus (derived from Byzantine text-type manuscripts), it is written:
17 και ινα μη τις δυνηται αγορασαι η πωλησαι ει μη ο εχων το χαραγμα η το ονομα του θηριου η τον αριθμον του ονοματος αυτου 18 ωδε η σοφια εστιν ο εχων τον νουν ψηφισατω τον αριθμον του θηριου αριθμος γαρ ανθρωπου εστιν και ο αριθμος αυτου χξς.In the Novum Testamentum Graece (derived from various sources), the text reads:
17 καὶ ἵνα μή τις δύνηται ἀγοράσαι ἢ πωλῆσαι εἰ μὴ ὁ ἔχων τὸ χάραγμα, τὸ ὄνομα τοῦ θηρίου ἢ τὸν ἀριθμὸν τοῦ ὀνόματος αὐτοῦ. 18 ὧδε ἡ σοφία ἐστίν· ὁ ἔχων νοῦν ψηφισάτω τὸν ἀριθμὸν τοῦ θηρίου, ἀριθμὸς γὰρ ἀνθρώπου ἐστίν· καὶ ὁ ἀριθμὸς αὐτοῦ ἑξακόσιοι ἑξήκοντα ἕξ.The number is the final 3 letters or words (transliterated: χξς’ or ἑξακόσιοι ἑξήκοντα ἕξ), it is "six hundred sixty-six."
The King James Version of the Bible translates:
And that no man might buy or sell, save he that had the mark, or the name of the beast, or the number of his name. Here is wisdom. Let him that hath understanding count the number of the beast: for it is the number of a man; and his number is Six hundred threescore and six.In the Old Testament, both 1 Kings 10:14 and 2 Chronicles 9:13 state that Solomon collected "six hundred threescore and six" talents of gold each year. John's reference to "wisdom" and "understanding" might also point toward Proverbs 1 and 2, where understanding, discernment, wisdom and insight are explained and advised by King Solomon. In the Greek manuscripts, the number is rendered in Greek numerical form as χξϛʹ, or sometimes literally as ἑξακόσιοι ἑξήκοντα ἕξ, hexakósioi hexēkonta héx, "six hundred and sixty-six".
There are several interpretations-translations for the meaning of the phrase "Let him that hath understanding count the number of the beast" where the peculiar Greek word ψηφισάτω (psefisato) is used. Possible translations include not only "to count", "to reckon" but also "to vote" or "to decide".
Although Irenaeus (2nd century AD) affirmed the number to be 666 and reported several scribal errors of the number, there is still doubt by a minority of theologians about the original reading.
