Names of 1668
| Nominal | 1668 |
| Cardinal | one thousand six hundred sixty-eight |
| Ordinal | 1,668th |
| This number as US currency | one thousand six hundred sixty-eight dollars |
| Is 1668 an odd number? | 1668 is NOT an odd number |
| Is 1668 an even number? | 1668 is an even number |
| Is 1668 a palindrome? | 1668 is NOT a palindrome number |
| Is 1668 a triangle number? | 1668 is NOT a triangle number |
1668 in other Bases
| Base 2 (Binary) | 110100001002 |
| Base 3 (Ternary) | 20212103 |
| Base 4 (Quaternary) | 1220104 |
| Base 5 (Quinary) | 231335 |
| Base 6 (Senary) | 114206 |
| Base 8 (Octal) | 32048 |
| Base 12 (Duodecimal) | B7012 |
| Base 16 (Hexadecimal) | 68416 |
| Base 20 (Vigesimal) | 43820 |
Primes and Factors tests for 1668
| Is 1668 a Prime Number? | 1668 is NOT a prime |
| Is 1668 a perfect number? | 1668 is NOT a perfect number |
| Is 1668 a Mersenne Prime? | 1668 is NOT a Mersenne prime |
| Is 1668 a Fermat Prime? | 1668 is NOT a Fermat prime |
| Is 1668 a Fibonacci Prime? | 1668 is NOT a Fibonacci prime |
| Is 1668 a Partition Prime? | 1668 is NOT a Partition prime |
| Is 1668 a Pell Prime? | 1668 is NOT a Pell prime |
| Prime Factors | Prime factors of 1668 |
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1668 in other Numerals
| 1668 in Roman Numeral | MDCLXVIII |
| 1668 in Chinese Numeral | 壹仟陸佰陸拾捌 |
| 1668 in Egyptian Numeral | 𓆼𓍧𓎋𓐁 |
| 1668 in Babylonian Numeral |   |
Roots and stuff for 1668
| Is 1668 a square number? | 1668 is NOT a square number |
| Is 1668 a cube number? | 1668 is NOT a cube number |
| Square root of the number 1668 | 40.841155713324 |
| Cube root of the number 1668 | 11.859471855163 |
Recreational math for 1668
| Number 1668 reversed | 8661 |
| Sum of the digits | 21 |
| No of digits | 4 |