165580171 has 2 divisors, whose sum is σ = 165580172. Its totient is φ = 165580170.

The previous prime is 165580159. The next prime is 165580183. The reversal of 165580171 is 171085561.

It is a balanced prime because it is at equal distance from previous prime (165580159) and next prime (165580183).

It is a cyclic number.

It is not a de Polignac number, because 165580171 - 2⁷ = 165580043 is a prime.

It is not a weakly prime, because it can be changed into another prime (165530171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82790085 + 82790086.

It is an arithmetic number, because the mean of its divisors is an integer number (82790086).

Almost surely, 2^165580171 is an apocalyptic number.

165580171 is a deficient number, since it is larger than the sum of its proper divisors (1).

165580171 is an equidigital number, since it uses as much as digits as its factorization.

165580171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8400, while the sum is 34.

The square root of 165580171 is about 12867.7958874082. The cubic root of 165580171 is about 549.1227569241.

The spelling of 165580171 in words is "one hundred sixty-five million, five hundred eighty thousand, one hundred seventy-one".