I'm pretty sure the OP's sly reference (which is lost on 99% of us oldies here) is this current silliness...
The slang term "6-7" refers to a nonsensical expression popular among teens and tweens.
It is linked to the 2024 song "Doot Doot (6 7)" by rapper Skrilla and the NBA player LaMelo Ball, who is 6'7" tall.
This term has gained traction in youth culture, often used in a playful or humorous context.