777 is used on most slot machines in the United States to identify a jackpot. As it is considered a lucky number, banknotes with a serial number containing 777 tend to be valued by collectors and numismatists. The US Mint and the Bureau of Engraving and Printing sells uncirculated 777 $1 bills for this reason.

" 777 Casino  Best free classic slots games " is intended for an adult audience for entertainment purposes only. This game does not offer real money gambling or an opportunity to win real money or prizes. Success at social casino gambling does not guarantee success at real money gambling.