As-Salam aleikum wa rahmatullahi wa baraketuh dear brother TruthExposer777,
an excellent research on this issue was done by Michael Scheifler, where he proved sufficiently enough that the number 666 has a connection with the latin phrase Vicarius Filii Dei (Vicar of the Son of God) used by Popes. This view is supported by a powerful references coming directly from documents of the Roman Catholic Church. Here is the work of Michael Scheifler (I have talked about it in one of my earlier topics):
Link: http://biblelight.net/666.htmRead it for entire and I guarantee you will be surprised! It can be used against all Catholics - including Walid Shoebat and other Islamophobes - who desperately tries to make this number as an allusion to Islam or Allah. For your information, no one has refuted Michael Scheifler argument
May Allah guide him to Islam.
Take care, and salam
Ahmed