Q: How Many Digits in the Number 666,545,421?

 A: The number 666,545,421 has 9 digits.

How does 666,545,421 have 9 digits?

You simply count the number of digits from the first number to the last. Like this:


666545421
Digit # 123456789

What are the number of digits of the numbers near 666,545,421?

666,545,419666,545,420666,545,422666,545,423
9999

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