165185808 has 20 divisors (see below), whose sum is σ = 426730128. Its totient is φ = 55061920.

The previous prime is 165185771. The next prime is 165185809. The reversal of 165185808 is 808581561.

It is a happy number.

It is a super-2 number, since 2×165185808² = 54572702329225728, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 165185808.

It is not an unprimeable number, because it can be changed into a prime (165185809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1720638 + ... + 1720733.

Almost surely, 2^165185808 is an apocalyptic number.

It is an amenable number.

165185808 is an abundant number, since it is smaller than the sum of its proper divisors (261544320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165185808 is a wasteful number, since it uses less digits than its factorization.

165185808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3441382 (or 3441376 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 42.

The square root of 165185808 is about 12852.4631102369. The cubic root of 165185808 is about 548.6864610267.

The spelling of 165185808 in words is "one hundred sixty-five million, one hundred eighty-five thousand, eight hundred eight".