165665016 has 48 divisors (see below), whose sum is σ = 489467160. Its totient is φ = 50201280.

The previous prime is 165665011. The next prime is 165665053. The reversal of 165665016 is 610566561.

165665016 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165665011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 103795 + ... + 105378.

Almost surely, 2^165665016 is an apocalyptic number.

It is an amenable number.

165665016 is an abundant number, since it is smaller than the sum of its proper divisors (323802144).

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

165665016 is a wasteful number, since it uses less digits than its factorization.

165665016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209196 (or 209189 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 165665016 is about 12871.0922613429. The cubic root of 165665016 is about 549.2165329774.

The spelling of 165665016 in words is "one hundred sixty-five million, six hundred sixty-five thousand, sixteen".