Q: What is the digital root of 100,021,661

 A: 8

Why is 8 the digital root of the number 100,021,661?

The digital root of a number is calculated by splitting the digits of a number and then adding them together. You keep splitting and adding the digits until you reach a single positive number.

How do you calculate the digital root of 100,021,661?


Split the number up and add each digit together:


1 + 0 + 0 + 0 + 2 + 1 + 6 + 6 + 1 = 17

If the answer is more than one digit, you would add each digit of the answer together again:

1 + 7 = 8

What is the digital root of number 100,021,661?

Answer: 8


More Examples

Number 100,021,659100,021,660100,021,662100,021,663
Digital Root 6791

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