Fun fact

I don't know what I thought it meant.

But it wasn't this.

But it was named for being 64 bit, not for this coincidence

There aren't 64 letters in the alphabet

This is false. It actually derived its name the fact that are only 64 such machines on Earth.
The 65th onward are Nintendo 69s: in-brand knockoffs marketted as 64s for sales after they realize people would see the name, say 'nice', and walk away without buying.

The fact that this made me count the alphabets and realizing there's only 26 of them is a proof that i'm a fool