165911027 has 2 divisors, whose sum is σ = 165911028. Its totient is φ = 165911026.

The previous prime is 165910999. The next prime is 165911047. The reversal of 165911027 is 720119561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165911027 - 2¹⁸ = 165648883 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 165910984 and 165911002.

It is not a weakly prime, because it can be changed into another prime (165911047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82955513 + 82955514.

It is an arithmetic number, because the mean of its divisors is an integer number (82955514).

Almost surely, 2^165911027 is an apocalyptic number.

165911027 is a deficient number, since it is larger than the sum of its proper divisors (1).

165911027 is an equidigital number, since it uses as much as digits as its factorization.

165911027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3780, while the sum is 32.

The square root of 165911027 is about 12880.6454419024. The cubic root of 165911027 is about 549.4882589905.

The spelling of 165911027 in words is "one hundred sixty-five million, nine hundred eleven thousand, twenty-seven".