Sum of Digits of 669
ANSWER : 21
The sum of the digits in the number 669 is: 6 + 6 + 9 = 21
How to Calculate the Digit Sum of 669?
To find the sum of digits of a number, simply break it into individual digits and add them. For 669:
6 + 6 + 9 = 21
The digits of 669 are: 6, 6, 9.
Their sum is: 21
Step-by-Step Digit Sum of 669
We split the number 669 into its individual digits: 6 + 6 + 9 = 21
Digit Positions in 669
| Position | Digit |
|---|---|
| 1 | 6 |
| 2 | 6 |
| 3 | 9 |
Length of 669
The number 669 has 3 digits.
Is 21 a Prime Number?
No, 21 is not a prime number.
Digit Sums in Other Bases
- Binary: 1010011101 → 6
- Octal: 1235 → 11
- Hexadecimal: 29D → 24