The number 7 is seen as lucky in slots and pop culture because it’s tied to...

https://judahsexcellentthoughtss.yousher.com/what-does-a-red-7-mean-compared-to-a-blue-7-in-slots

The number 7 is seen as lucky in slots and pop culture because it’s tied to positive ideas like the seven-day week, which feels complete and balanced. In classic slots, hitting 777 often means a jackpot win