The meaning of 666 and its identity
666 is primarily a Physical Mark upon a person, WHO is in agreement with A (positioned head Governor) called by men (a king, president, chairman, etc.) called in Scripture a BEAST (which shall ultimately BE Satan himself) of World Wide Ungodly Governance OVER a World Wide Population “WHICH” such portion of said Population DOES NOT have God”s SEED.
(Gods SEED, being the guaranteed precursor to that individual established to Receive Gods Mark upon them, according to the Timeframe, God has Established and Promised.)
Glory to God,
Taken
Lets look at what scripture shows us...
Isaiah 8:16 "Bind up the testimony, seal the law among my disciples."
A seal was something that held fast and in this context was binded up.
Deuteronomy 6:2,
8 That you might fear the LORD your God, to keep all his statutes and his commandments, which I command you....And you shall bind them for a sign on your hand, and they shall be as frontlets between your eyes.
and we see it will be a sign...
Exodus 13:9 And it shall be for a sign unto thee upon thine hand, and for a memorial between thine eyes, that the Lord's law may be in thy mouth.
Exodus 31:13,
17 Truly My Sabbaths you shall keep: for it is a sign between Me and you throughout your generations; that you may know that I am the Lord that does sanctify you....It is a sign between Me and the children of Israel for ever.
and it is forever. But look at what do you do on the Sabbath, can we say 'worship' God.
The Mark of the Beast is about keeping of God's law especially worship, same as it always has been, and the Sabbath is at the center.