What does 666 mean in the Bible?

The verse

Revelation 13 describes two beasts. One rises from the sea, seven-headed like the dragon, and the world worships it. A second rises from the land and marks everyone on the right hand or the forehead, so that “no one would be able to buy or to sell unless he has that mark.” Then John gives his readers a riddle.

Here is wisdom. He who has understanding, let him calculate the number of the beast, for it is the number of a man. His number is six hundred sixty-six.

“Calculate” is the key word. John expects his first readers to be able to work it out.

Letters were numbers

Hebrew and Greek had no separate digits. Each letter also stood for a number, so every name had a numerical value. The practice has a name, gematria. A graffito in Pompeii plays the same game: “I love her whose number is 545.”

Now spell Nero Caesar in Hebrew letters, Nrwn Qsr: nun 50, resh 200, vav 6, nun 50; qof 100, samekh 60, resh 200. The total is 666. That is why most scholars think the beast’s number names Nero. And there is a remarkable confirmation. Some ancient manuscripts of Revelation give the number as 616, and the Christian writer Irenaeus already knew of that reading around AD 180. Drop the final n, as the Latin spelling of Nero does, and the total is 616. Both numbers point to the same man.

Why Nero?

Nero was the first emperor to kill Christians, after the great fire of Rome in AD 64, and tradition says Peter and Paul died under him. When he died in 68, rumors said he was not dead at all and would return from the east; Tacitus and Suetonius report false Neros appearing. A beast whose fatal wound is healed (Revelation 13:3) fits that rumor, many scholars think. Most read the beast from the sea as Rome and its emperor cult, and John wrote about AD 95, under Domitian, when the pressure on the churches of Asia was real.

What 666 is not

Every age has found its own beast in the number, from medieval emperors to Napoleon. That says more about the readers than about the riddle. The word Antichrist never appears in Revelation; it belongs to the letters of John. Films like The Omen (1976) merged the two, and the barcodes, chips and credit cards of later scares are not in the text. Some readers also take 666 as a symbol, falling short of seven, the book’s number of completeness, again and again.

Revelation itself is a book of symbols: a woman clothed with the sun, a red dragon, a Lamb that was slain. Read in its own world, the number of the beast is less a code for the future than a dangerous joke about the most powerful man on earth, told by people he was killing.