Q: What is the digital root of 66,620,221

 A: 7

Why is 7 the digital root of the number 66,620,221?

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 66,620,221?


Split the number up and add each digit together:


6 + 6 + 6 + 2 + 0 + 2 + 2 + 1 = 25

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

2 + 5 = 7

What is the digital root of number 66,620,221?

Answer: 7


More Examples

Number 66,620,21966,620,22066,620,22266,620,223
Digital Root 5689

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