165900871 has 8 divisors (see below), whose sum is σ = 171417600. Its totient is φ = 160394520.

The previous prime is 165900857. The next prime is 165900887. The reversal of 165900871 is 178009561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 165900871 - 2⁹ = 165900359 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165900871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165901871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42750 + ... + 46468.

It is an arithmetic number, because the mean of its divisors is an integer number (21427200).

Almost surely, 2^165900871 is an apocalyptic number.

165900871 is a deficient number, since it is larger than the sum of its proper divisors (5516729).

165900871 is a wasteful number, since it uses less digits than its factorization.

165900871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5189.

The product of its (nonzero) digits is 15120, while the sum is 37.

The square root of 165900871 is about 12880.2512009665. The cubic root of 165900871 is about 549.4770467226.

The spelling of 165900871 in words is "one hundred sixty-five million, nine hundred thousand, eight hundred seventy-one".