166080731 has 2 divisors, whose sum is σ = 166080732. Its totient is φ = 166080730.

The previous prime is 166080689. The next prime is 166080737. The reversal of 166080731 is 137080661.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166080731 is a prime.

It is a super-2 number, since 2×166080731² = 55165618418988722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (166080737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83040365 + 83040366.

It is an arithmetic number, because the mean of its divisors is an integer number (83040366).

Almost surely, 2^166080731 is an apocalyptic number.

166080731 is a deficient number, since it is larger than the sum of its proper divisors (1).

166080731 is an equidigital number, since it uses as much as digits as its factorization.

166080731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 166080731 is about 12887.2313163069. The cubic root of 166080731 is about 549.6755452752.

The spelling of 166080731 in words is "one hundred sixty-six million, eighty thousand, seven hundred thirty-one".