An explanation of this can be found at www.carm.com (that is Christian Apologetics and Research Ministry)
This is what it says:
"Here is wisdom. Let him who has understanding calculate the number of the beast, for the number is that of a man; and his number is six hundred and sixty-six," (Rev. 13:18).
666 is the number of the antichrist, the end times figure who will arise with the purpose of opposing God and God's people. 666 is the gamatria of the name of the antichrist.
In Greek and Hebrew there are no numeric characters. There are only alpha characters. For example, the letters a, b, c, d, e, f, etc. are alpha characters. The numbers 0, 1, 2, 3, etc., are numeric characters. They are different -- except for the letter "o" and the number "0". When the Greeks wanted to write a number, they used letters for numbers. The Greek letter "alpha" had the numeric equivalent of 1. The next letter "beta" has the numeric equivalent of 2, and so on. (CARM has a chart of the Hebrew and Greek numeric equivalents if you are interested in more information.)
Therefore, whenever a word in Greek is written, because the letters are also numbers, every word has a numeric value. This numeric value is called a gematria. The Greek word for Jesus (IhsouV) has a mathematical equivalent of 888. Also, the Greek word for fish is 1224.
What The Bible is saying is that the future antichrist will have a name that when it is written in Greek, its numeric equivalent will be 666.
It is also symbolic as the number of a false Trinity. God's perfect number is 7 and God has 3 distinct persons (Father, Son and Holy Spirit). The false trinity is the number of man (man was created on the 6th "day"), with the beast (father - devil) and the "false prophet" (unholy spirit), thus 6 6 6.
It can be either. The numbers are based on the numerical value of the letters of the name Nero Caesar. The difference in the numbers comes from the transliteration of the spelling of this name from Hebrew to Greek which includes an additional letter.
666 number of the beast in the book of revelations
And the number of the beast is 666
666 number of the beast (in the Bible - Book of Revelation)
The beast has the number 666 associated with it.
666 the number of the beast.
No, 666 is not the mark of the beast. 666 is the numberof the beast. The mark of the beast is a spiritual mark and is connected with worship. The number 666 is the number of a man, which helps us identify who the beast is.
The product is 666
666 = Number of the Beast (in the Book of Revelation)
The combination of the mysterious suitcase is "666", the "number of the beast.
DCLXVI= 666 666 is the number of the beast these were the digists of roman emperor Nero
Three times... 666 pieces of gold for the king, 666 men of the tribes and 666 mentioned in revelations as the number of man and beast.
Iron Maiden.