7.
7 digits.
6
There are 6 zeros in one million written in digits (1,000,000).
9 digits
250 million = 250,000,000. There are 9 digits in this number.
99,800 of them.
100,000,000 = nine digits.
There are 8 digits in 65,600,000
There are seven digits.
One of them.
We only use 10 digits (0 through 9), so I would say, there is one of them.
200,000,000 9 digits.