On its side, it’s the symbol for infinity.
It’s a power of 2.
It’s a homophone (remember the old joke, Why was six afraid of seven? Because seven ate nine.)
It’s a Fibonacci number.
It’s the number of notes in an octave.
It’s the number of planets in the solar system (sorry, Pluto, we still miss you).
It’s the age of my firstborn son. Happy birthday, Ben!