Before Jerusalem Fell: Dating the Book of Revelation

The number of the beast is 666, six hundred and sixty six. But what does this mean. And who is this diabolical creature? What is the name of the beast. I believe that that there is a very specific and definitive answer, what do you think? Is it a contemporary of John, the author of Revelation, or someone from today? This is based on Revelation 13:18 (quotation from the Bible, English Standard Version): "This calls for wisdom: let the one who has understanding calculate the number of the beast, for it is the number of a man, and his number is 666."I am grateful to the work of the scholar Kenneth Gentry on this topic, especially on the dating of Revelation. For more: https://www.amazon.co.uk/Before-Jerusalem-Fell-Dating-Revelation-ebook/dp/B076HJ5F5H/ref=sr_1_2?dchild=1&keywords=kenneth+gentry+the+number+of+the+beast&qid=1598651700&sr=8-2In depth treatment in a long video by Kenneth Gentry https://www.youtube.com/watch?v=Sy7cEW4MJac...https://www.youtube.com/watch?v=T-9Eh8P0rKU