Q: What is the digital root of 66,640,017

 A: 3

Why is 3 the digital root of the number 66,640,017?

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 66,640,017?


Split the number up and add each digit together:


6 + 6 + 6 + 4 + 0 + 0 + 1 + 7 = 30

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

3 + 0 = 3

What is the digital root of number 66,640,017?

Answer: 3


More Examples

Number 66,640,01566,640,01666,640,01866,640,019
Digital Root 1245

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