165886163 has 2 divisors, whose sum is σ = 165886164. Its totient is φ = 165886162.

The previous prime is 165886157. The next prime is 165886181. The reversal of 165886163 is 361688561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 165886163 - 2⁶ = 165886099 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (165886103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82943081 + 82943082.

It is an arithmetic number, because the mean of its divisors is an integer number (82943082).

Almost surely, 2^165886163 is an apocalyptic number.

165886163 is a deficient number, since it is larger than the sum of its proper divisors (1).

165886163 is an equidigital number, since it uses as much as digits as its factorization.

165886163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 44.

The square root of 165886163 is about 12879.6802367140. The cubic root of 165886163 is about 549.4608082159.

The spelling of 165886163 in words is "one hundred sixty-five million, eight hundred eighty-six thousand, one hundred sixty-three".