The number 33665
33665 is a composite number with 4 divisors. Its prime factorisation is 5 × 6733. Divisors (4): 1, 5, 6733, 33665.
Pick any whole number from 1 to 100,000.
How to work it out
- 1
What is special about 33665: a semiprime: 5 × 6733, the product of two primes.
- 2
33665 is composite. Its prime factorisation is
- 3
The divisors add up to 40404; without 33665 itself that is 6739, so 33665 is deficient (6739 is less than 33665). Euler's totient φ(33665) = 26928 numbers up to 33665 share no factor with it.
- 4
The digits of 33665 add up to 23, and repeating that until one digit is left gives the digital root 5. The Collatz sequence (halve if even, else 3n+1) takes 67 steps to reach 1.
LaTeX source of the formulas on this page
\[ 33665 = 5 \times 6733 \]
33665 at a glance
| Property | Value |
|---|---|
| Type | composite |
| Number of divisors | 4 |
| Sum of divisors | 40404 |
| Euler totient φ(n) | 26928 |
| Square | 1133332225 |
| Cube | 38153629354625 |
| Square root | 183.480244 |
| Digit sum / digital root | 23 / 5 |
| Collatz steps to 1 | 67 |
| Scientific notation | 3.3665 × |
33665 in other forms
| Form | Value |
|---|---|
| In words | thirty-three thousand six hundred and sixty-five |
| Binary (base 2) | 1000001110000001 |
| Octal (base 8) | 101601 |
| Hexadecimal (base 16) | 8381 |
| Base 3 | 1201011212 |
| As time | 33665 seconds = 9 h 21 min 5 s |
Is 33665 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 1) | A number is divisible by 4 if the last two digits make a multiple of 4. |
| 5 | Yes (33665 ÷ 5 = 6733) | 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 | No (remainder 2) | 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 1) | A number is divisible by 8 if the last three digits make a multiple of 8. |
| 9 | No (remainder 5) | A number is divisible by 9 if the digits add up to a multiple of 9. |
| 10 | No (remainder 5) | 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 5) | A number is divisible by 12 if it is divisible by both 3 and 4. |
Questions
Is 33665 a prime number?
No. 33665 = 5 × 6733, so it is divisible by 5.
What are the factors of 33665?
1, 5, 6733, 33665.
What is 33665 in binary?
1000001110000001 (hexadecimal 8381, octal 101601).
What is the square root of 33665?
About 183.4802.
Is 33665 divisible by 3?
No. Its digits add up to 23, which is not a multiple of 3.
What is special about the number 33665?
33665 is a semiprime: 5 × 6733, the product of two primes.