## Belphegor’s prime

$1000000000000066600000000000001$

Or in other words, 1, followed by 13 zeroes, followed by 666, followed by 13 more zeroes, then another 1. Too spoopy!!

## Zero

Come on, you know this one.

## On

Combinatorial game theory says hi!

Combinatorial game theory also says that $\text{on}=\{\text{on}|\}$ isn’t actually a *number*, but we like to have fun here.

$\text{off}$ is cool too.

## $\sqrt{2}$

I just think it’s neat.

## $2$

I’ve recently come to appreciate 2 for the super cool number it is. Go check the Fun Facts page for a really cool property about powers of 2.