: In numerology, the number 7 often represents divine perfection. As such, 6 is seen as falling short, and a triple 6 (666) signifies a system of total human failure or rebellion against the divine. Digital and Modern Interpretations

: Many scholars use gematria (assigning numerical values to letters) to link 666 to the Roman Emperor Nero , who famously persecuted early Christians.

: Found in Revelation 13:18, it is described as the "number of a man" and the identifying mark required for individuals to buy or sell under a specific prophetic system.