Names of 81664
| Nominal | 81664 |
| Cardinal | eighty-one thousand six hundred sixty-four |
| Ordinal | 81,664th |
| This number as US currency | eighty-one thousand six hundred sixty-four dollars |
| Is 81664 an odd number? | 81664 is NOT an odd number |
| Is 81664 an even number? | 81664 is an even number |
| Is 81664 a palindrome? | 81664 is NOT a palindrome number |
| Is 81664 a triangle number? | 81664 is NOT a triangle number |
81664 in other Bases
| Base 2 (Binary) | 100111111000000002 |
| Base 3 (Ternary) | 110110001213 |
| Base 4 (Quaternary) | 1033300004 |
| Base 5 (Quinary) | 101031245 |
| Base 6 (Senary) | 14300246 |
| Base 8 (Octal) | 2374008 |
| Base 12 (Duodecimal) | 3B31412 |
| Base 16 (Hexadecimal) | 13F0016 |
| Base 20 (Vigesimal) | A43420 |
Primes and Factors tests for 81664
| Is 81664 a Prime Number? | 81664 is NOT a prime |
| Is 81664 a perfect number? | 81664 is NOT a perfect number |
| Is 81664 a Mersenne Prime? | 81664 is NOT a Mersenne prime |
| Is 81664 a Fermat Prime? | 81664 is NOT a Fermat prime |
| Is 81664 a Fibonacci Prime? | 81664 is NOT a Fibonacci prime |
| Is 81664 a Partition Prime? | 81664 is NOT a Partition prime |
| Is 81664 a Pell Prime? | 81664 is NOT a Pell prime |
| Prime Factors | Prime factors of 81664 |
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81664 in other Numerals
| 81664 in Roman Numeral | LXXXMDCLXIV |
| 81664 in Chinese Numeral | 捌萬壹仟陸佰陸拾肆 |
| 81664 in Egyptian Numeral | 𓂴𓆼𓍧𓎋𓏽 |
| 81664 in Babylonian Numeral |    |
Roots and stuff for 81664
| Is 81664 a square number? | 81664 is NOT a square number |
| Is 81664 a cube number? | 81664 is NOT a cube number |
| Square root of the number 81664 | 285.76913759187 |
| Cube root of the number 81664 | 43.385394364617 |
Recreational math for 81664
| Number 81664 reversed | 46618 |
| Sum of the digits | 25 |
| No of digits | 5 |