666 = WWW = The Internet

WorldWideWeb = www.google.com for example

W = 6th letter in the Hebrew alphabet 

The Hebrew quivalent of our "w" is the letter "vav" or "waw", 6th letter

The Bible:

Sweden employee's: Chip in right hand to open doors. 

The Bible: mark on their right hand 666

India: pay via smartphone

The Bible: buy & sell with mark of the beast: WWW or 666

China: Social credit & Pay system

 via Smartphone

The Bible: mark on their forehead = smartphone