65 is a positive integer between 64 and 66. Properties Edit 65 is an odd composite number. 65 is the 5th octagonal number. 65 is equal to 13!!!!!!!!, the octuple factorial of 13. File:65.jpeg Retrieved from "https://large-numbers.fandom.com/wiki/65?oldid=5662" Categories: Pages with broken file links Add category Cancel Save Community content is available under CC-BY-SA unless otherwise noted.