Number associated with the beast in the Book of Revelation; either 666 or 616, depending on the manuscript
The number of the beast () is associated with the Beast of Revelation in chapter 13, verse 18 of the Book of Revelation. In most manuscripts of the New Testament and in English translations of the Bible, the number of the beast is six hundred sixty-six or χξϛ (in Greek numerals, χ represents 600, ξ represents 60 and ϛ represents 6). Wikipedia