The key passage reads: “He causes all, both small and great, rich and poor, free and slave, to receive a mark on their right hand or on their foreheads, and that no one may buy or sell except one who has the mark or the name of the beast, or the number of his name” (Revelation 13:16-17). Verse 18 identifies the related “number of the beast” as 666, which is covered in our article “
666: The Number of the Beast.”
The number 6 and its meaning is related to
man and human weakness, the evils of the devil and the manifestation of sin.