166157908031 has 2 divisors, whose sum is σ = 166157908032. Its totient is φ = 166157908030.

The previous prime is 166157907977. The next prime is 166157908039. The reversal of 166157908031 is 130809751661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166157908031 - 2⁶ = 166157907967 is a prime.

It is a super-2 number, since 2×166157908031² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166157908039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83078954015 + 83078954016.

It is an arithmetic number, because the mean of its divisors is an integer number (83078954016).

Almost surely, 2^166157908031 is an apocalyptic number.

166157908031 is a deficient number, since it is larger than the sum of its proper divisors (1).

166157908031 is an equidigital number, since it uses as much as digits as its factorization.

166157908031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 47.

The spelling of 166157908031 in words is "one hundred sixty-six billion, one hundred fifty-seven million, nine hundred eight thousand, thirty-one".