Q: What is the digital root of 666,721,819
A: 1
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.
Split the number up and add each digit together:
If the answer is more than one digit, you would add each digit of the answer together again:
What is the digital root of number 666,721,819?
Answer: 1
Number | 666,721,817 | 666,721,818 | 666,721,820 | 666,721,821 |
Digital Root | 8 | 9 | 2 | 3 |