Names of 664
| Nominal | 664 |
| Cardinal | six hundred sixty-four |
| Ordinal | 664th |
| This number as US currency | six hundred sixty-four dollars |
| Is 664 an odd number? | 664 is NOT an odd number |
| Is 664 an even number? | 664 is an even number |
| Is 664 a palindrome? | 664 is NOT a palindrome number |
| Is 664 a triangle number? | 664 is NOT a triangle number |
664 in other Bases
| Base 2 (Binary) | 10100110002 |
| Base 3 (Ternary) | 2201213 |
| Base 4 (Quaternary) | 221204 |
| Base 5 (Quinary) | 101245 |
| Base 6 (Senary) | 30246 |
| Base 8 (Octal) | 12308 |
| Base 12 (Duodecimal) | 47412 |
| Base 16 (Hexadecimal) | 29816 |
| Base 20 (Vigesimal) | 1D420 |
Primes and Factors tests for 664
| Is 664 a Prime Number? | 664 is NOT a prime |
| Is 664 a perfect number? | 664 is NOT a perfect number |
| Is 664 a Mersenne Prime? | 664 is NOT a Mersenne prime |
| Is 664 a Fermat Prime? | 664 is NOT a Fermat prime |
| Is 664 a Fibonacci Prime? | 664 is NOT a Fibonacci prime |
| Is 664 a Partition Prime? | 664 is NOT a Partition prime |
| Is 664 a Pell Prime? | 664 is NOT a Pell prime |
| Prime Factors | Prime factors of 664 |
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664 in other Numerals
| 664 in Roman Numeral | DCLXIV |
| 664 in Chinese Numeral | 陸佰陸拾肆 |
| 664 in Egyptian Numeral | 𓍧𓎋𓏽 |
| 664 in Babylonian Numeral |   |
Roots and stuff for 664
| Is 664 a square number? | 664 is NOT a square number |
| Is 664 a cube number? | 664 is NOT a cube number |
| Square root of the number 664 | 25.76819745345 |
| Cube root of the number 664 | 8.7241413429097 |
Recreational math for 664
| Number 664 reversed | 466 |
| Sum of the digits | 16 |
| No of digits | 3 |