165885359 has 4 divisors (see below), whose sum is σ = 166579680. Its totient is φ = 165191040.

The previous prime is 165885353. The next prime is 165885373. The reversal of 165885359 is 953588561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 165885359 - 2⁸ = 165885103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165885353) 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 in 3 ways as a sum of consecutive naturals, for example, 346802 + ... + 347279.

It is an arithmetic number, because the mean of its divisors is an integer number (41644920).

Almost surely, 2^165885359 is an apocalyptic number.

165885359 is a deficient number, since it is larger than the sum of its proper divisors (694321).

165885359 is an equidigital number, since it uses as much as digits as its factorization.

165885359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694320.

The product of its digits is 1296000, while the sum is 50.

The square root of 165885359 is about 12879.6490247211. The cubic root of 165885359 is about 549.4599205244.

The spelling of 165885359 in words is "one hundred sixty-five million, eight hundred eighty-five thousand, three hundred fifty-nine".