165791867 has 2 divisors, whose sum is σ = 165791868. Its totient is φ = 165791866.

The previous prime is 165791861. The next prime is 165791881. The reversal of 165791867 is 768197561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 165791867 - 2¹² = 165787771 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (165791861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82895933 + 82895934.

It is an arithmetic number, because the mean of its divisors is an integer number (82895934).

Almost surely, 2^165791867 is an apocalyptic number.

165791867 is a deficient number, since it is larger than the sum of its proper divisors (1).

165791867 is an equidigital number, since it uses as much as digits as its factorization.

165791867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 635040, while the sum is 50.

The square root of 165791867 is about 12876.0190664662. The cubic root of 165791867 is about 549.3566770136.

The spelling of 165791867 in words is "one hundred sixty-five million, seven hundred ninety-one thousand, eight hundred sixty-seven".