The number 6671
6671 is a composite number with 4 divisors. Its prime factorisation is 7 × 953. Divisors (4): 1, 7, 953, 6671.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 6671: a semiprime: 7 × 953, the product of two primes.
- 2
6671 is composite. Its prime factorisation is
- 3
The divisors add up to 7632; without 6671 itself that is 961, so 6671 is deficient (961 is less than 6671). Euler's totient φ(6671) = 5712 numbers up to 6671 share no factor with it.
- 4
The digits of 6671 add up to 20, and repeating that until one digit is left gives the digital root 2. The Collatz sequence (halve if even, else 3n+1) takes 181 steps to reach 1.
LaTeX source of the formulas on this page
\[ 6671 = 7 \times 953 \]
6671 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 7632 |
| Euler totient φ(n) | 5712 |
| Square | 44502241 |
| Cube | 296874449711 |
| Square root | 81.676190 |
| Digit sum / digital root | 20 / 2 |
| Collatz steps to 1 | 181 |
| Scientific notation | 6.671 × |
6671 in other forms
| Form | Value |
|---|---|
| In words | six thousand six hundred and seventy-one |
| Binary (base 2) | 1101000001111 |
| Octal (base 8) | 15017 |
| Hexadecimal (base 16) | 1A0F |
| Base 3 | 100011002 |
| As time | 6671 seconds = 1 h 51 min 11 s |
Is 6671 divisible by 2 to 12?
| Divisor | Answer | Rule |
|---|---|---|
| 2 | No (remainder 1) | A number is divisible by 2 if the last digit is even (0, 2, 4, 6, 8). |
| 3 | No (remainder 2) | A number is divisible by 3 if the digits add up to a multiple of 3. |
| 4 | No (remainder 3) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | No (remainder 1) | A number is divisible by 5 if the last digit is 0 or 5. |
| 6 | No (remainder 5) | A number is divisible by 6 if it is divisible by both 2 and 3. |
| 7 | Yes (6671 ÷ 7 = 953) | A number is divisible by 7 if double the last digit and subtract it from the rest: the result is a multiple of 7. |
| 8 | No (remainder 7) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 2) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 1) | A number is divisible by 10 if the last digit is 0. |
| 11 | No (remainder 5) | A number is divisible by 11 if the alternating sum of the digits is a multiple of 11. |
| 12 | No (remainder 11) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 6671 a prime number?
No. 6671 = 7 × 953, so it is divisible by 7.
What are the factors of 6671?
1, 7, 953, 6671.
What is 6671 in binary?
1101000001111 (hexadecimal 1A0F, octal 15017).
What is the square root of 6671?
About 81.6762.
Is 6671 divisible by 3?
No. Its digits add up to 20, which is not a multiple of 3.
What is special about the number 6671?
6671 is a semiprime: 7 × 953, the product of two primes.