What number has 66 zeros?

Answer 1

Oh, dude, that's a big number! So, if you're looking for a number with 66 zeros, you're talking about 10 to the power of 66, which is basically 1 followed by 66 zeros. Like, that's a whole lot of zeros, man.

Answer 2

In short-scale notation, most common in the United States and in modern British usage, 1066 is one unvigintillion.

In long-scale notation, most common in archaic British usage and in continental Europe, 1066 is one undecillion.