168 (number)
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| Cardinal | one hundred sixty-eight | |||
| Ordinal | 168th (one hundred and sixty-eighth) |
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| Factorization | 23× 3 × 7 | |||
| Divisors | 1, 2, 3, 4, 6, 7, 8, 12, 14, 21, 24, 28, 42, 56, 84, 168 | |||
| Roman numeral | CLXVIII | |||
| Binary | 101010002 | |||
| Ternary | 200203 | |||
| Quaternary | 22204 | |||
| Quinary | 11335 | |||
| Senary | 4406 | |||
| Octal | 2508 | |||
| Duodecimal | 12012 | |||
| Hexadecimal | A816 | |||
| Vigesimal | 8820 | |||
| Base 36 | 4O36 | |||
168 (one hundred [and] sixty-eight) is the natural number following 167 and preceding 169.
168 is an even number, a composite number, an abundant number, and an idoneal number.
There are 168 primes less than 1000. 168 is the product of the first two perfect numbers.
168 is the order of the group PSL(2,7), the second smallest nonabelian simple group.
From Hurwitz's automorphisms theorem, 168 is the maximum possible number of automorphisms of a genus 3 Riemann surface, this maximum being achieved by the Klein quartic, whose symmetry group is PSL(2,7). The Fano plane has 168 symmetries.
168 is the sum of four consecutive prime numbers: 37 + 41 + 43 + 47.
168 is also:
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Wikipedia