The number 7 is seen as lucky in slots and pop culture because it often appears...

https://www.active-bookmarks.win/the-number-7-is-seen-as-lucky-in-slots-and-pop-culture-because-it-appears-often

The number 7 is seen as lucky in slots and pop culture because it often appears as a winning symbol, like the classic 777 combo on slot machines. Its lucky vibe is strengthened by the seven-day week, which is a familiar and natural pattern people rely on