Create Free Account | Log In


A Unvigintillion (1 Unvigintillion) is 10 to the power of 66 (10^66). This is a very giant number!

How many zeros in a Unvigintillion?

There are 66 zeros in a Unvigintillion.

What's before Unvigintillion?

A Vigintillion is smaller than a Unvigintillion.

What's after Unvigintillion?

A Duovigintillion is larger than a Unvigintillion.


A Unvigintillionaire is someone whos assets, net worth or wealth is 1 or more Unvigintillion. It is unlikely anyone will ever be a true Unvigintillionaire. If you want to be a Unvigintillionaire, play Tap Tales!

Is Unvigintillion the largest number?

Unvigintillion is not the largest number. Infinity best describes the largest possible number - if there even is one! We cannot comprehend what the largest number actually is.

Unvigintillion written out

Unvigintillion is written out as:


Big Numbers

This is just one of many really big numbers!

Play Now

Choose your device:

FREE to download and play!