165164646 has 16 divisors (see below), whose sum is σ = 338386608. Its totient is φ = 53712000.

The previous prime is 165164641. The next prime is 165164651. The reversal of 165164646 is 646461561.

It is a happy number.

165164646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (165164641) and next prime (165164651).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165164641) 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, 335455 + ... + 335946.

It is an arithmetic number, because the mean of its divisors is an integer number (21149163).

Almost surely, 2^165164646 is an apocalyptic number.

165164646 is an abundant number, since it is smaller than the sum of its proper divisors (173221962).

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

165164646 is a wasteful number, since it uses less digits than its factorization.

165164646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671447.

The product of its digits is 103680, while the sum is 39.

The square root of 165164646 is about 12851.6398175486. The cubic root of 165164646 is about 548.6630292341.

The spelling of 165164646 in words is "one hundred sixty-five million, one hundred sixty-four thousand, six hundred forty-six".