165065256 has 64 divisors (see below), whose sum is σ = 461030400. Its totient is φ = 54720000.

The previous prime is 165065249. The next prime is 165065281. The reversal of 165065256 is 652560561.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 165065256.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39256 + ... + 43256.

It is an arithmetic number, because the mean of its divisors is an integer number (7203600).

Almost surely, 2^165065256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165065256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230515200).

165065256 is an abundant number, since it is smaller than the sum of its proper divisors (295965144).

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

165065256 is a wasteful number, since it uses less digits than its factorization.

165065256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4207 (or 4197 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 165065256 is about 12847.7724139245. The cubic root of 165065256 is about 548.5529520842.

The spelling of 165065256 in words is "one hundred sixty-five million, sixty-five thousand, two hundred fifty-six".