A brain teaser, What is the highest regular counting number that is spelled without the use of the letter “N”? (No numbers like Googolplex or Graham’s number)

This is probably wrong but here's my logic anyway: It must be a 2 digit number because anything higher (in the hundreds, thousands, millions ect.) will have the letter N in it. It can't be in the 90s or have a 9 in it, so then it would be 88.

But I'm probably missing something glaringly obvious...