167666750891 has 2 divisors, whose sum is σ = 167666750892. Its totient is φ = 167666750890.

The previous prime is 167666750857. The next prime is 167666750893. The reversal of 167666750891 is 198057666761.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 167666750891 - 2³⁰ = 166593009067 is a prime.

It is a super-2 number, since 2×167666750891² (a number of 23 digits) contains 22 as substring.

Together with 167666750893, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (167666750893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83833375445 + 83833375446.

It is an arithmetic number, because the mean of its divisors is an integer number (83833375446).

Almost surely, 2^167666750891 is an apocalyptic number.

167666750891 is a deficient number, since it is larger than the sum of its proper divisors (1).

167666750891 is an equidigital number, since it uses as much as digits as its factorization.

167666750891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22861440, while the sum is 62.

The spelling of 167666750891 in words is "one hundred sixty-seven billion, six hundred sixty-six million, seven hundred fifty thousand, eight hundred ninety-one".