Q: What is the digital root of 66,400,666

 A: 7

Why is 7 the digital root of the number 66,400,666?

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 66,400,666?


Split the number up and add each digit together:


6 + 6 + 4 + 0 + 0 + 6 + 6 + 6 = 34

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

3 + 4 = 7

What is the digital root of number 66,400,666?

Answer: 7


More Examples

Number 66,400,66466,400,66566,400,66766,400,668
Digital Root 5689

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