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

https://page-wiki.win/index.php/Does_Seeing_More_Sevens_Mean_Better_Odds_in_Slots%3F

The number 7 is seen as lucky in slots and pop culture because it often represents good fortune and completeness. For example, classic slot machines show triple 7s (777) as a winning combo