777777 (seven hundred [and] seventy-seven) is the natural number following 776 and preceding 778. The number 777 is snificant in numerous relious, cultural, and political contexts. InThe 777 casino slot symbol represents harmony and luck in many cultures, and it’s usually the top-tier symbol in this slots. Features. Classic 777 slots come with 3 reels and 1 to 5 pays,