Names of 660
| Nominal | 660 |
| Cardinal | six hundred sixty |
| Ordinal | 660th |
| This number as US currency | six hundred sixty dollars |
| Is 660 an odd number? | 660 is NOT an odd number |
| Is 660 an even number? | 660 is an even number |
| Is 660 a palindrome? | 660 is NOT a palindrome number |
| Is 660 a triangle number? | 660 is NOT a triangle number |
660 in other Bases
| Base 2 (Binary) | 10100101002 |
| Base 3 (Ternary) | 2201103 |
| Base 4 (Quaternary) | 221104 |
| Base 5 (Quinary) | 101205 |
| Base 6 (Senary) | 30206 |
| Base 8 (Octal) | 12248 |
| Base 12 (Duodecimal) | 47012 |
| Base 16 (Hexadecimal) | 29416 |
| Base 20 (Vigesimal) | 1D020 |
Primes and Factors tests for 660
| Is 660 a Prime Number? | 660 is NOT a prime |
| Is 660 a perfect number? | 660 is NOT a perfect number |
| Is 660 a Mersenne Prime? | 660 is NOT a Mersenne prime |
| Is 660 a Fermat Prime? | 660 is NOT a Fermat prime |
| Is 660 a Fibonacci Prime? | 660 is NOT a Fibonacci prime |
| Is 660 a Partition Prime? | 660 is NOT a Partition prime |
| Is 660 a Pell Prime? | 660 is NOT a Pell prime |
| Prime Factors | Prime factors of 660 |
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660 in other Numerals
| 660 in Roman Numeral | DCLX |
| 660 in Chinese Numeral | 陸佰陸拾 |
| 660 in Egyptian Numeral | 𓍧𓎋 |
| 660 in Babylonian Numeral |  |
Roots and stuff for 660
| Is 660 a square number? | 660 is NOT a square number |
| Is 660 a cube number? | 660 is NOT a cube number |
| Square root of the number 660 | 25.69046515733 |
| Cube root of the number 660 | 8.7065876911736 |
Recreational math for 660
| Number 660 reversed | 066 |
| Sum of the digits | 12 |
| No of digits | 3 |