166089907 has 2 divisors, whose sum is σ = 166089908. Its totient is φ = 166089906.

The previous prime is 166089871. The next prime is 166089919. The reversal of 166089907 is 709980661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166089907 - 2²⁷ = 31872179 is a prime.

It is not a weakly prime, because it can be changed into another prime (166089947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83044953 + 83044954.

It is an arithmetic number, because the mean of its divisors is an integer number (83044954).

Almost surely, 2^166089907 is an apocalyptic number.

166089907 is a deficient number, since it is larger than the sum of its proper divisors (1).

166089907 is an equidigital number, since it uses as much as digits as its factorization.

166089907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 166089907 is about 12887.5873226916. The cubic root of 166089907 is about 549.6856683237.

The spelling of 166089907 in words is "one hundred sixty-six million, eighty-nine thousand, nine hundred seven".