165565516 has 12 divisors (see below), whose sum is σ = 306783288. Its totient is φ = 77913152.

The previous prime is 165565511. The next prime is 165565531. The reversal of 165565516 is 615565561.

165565516 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (165565511) 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, 1217326 + ... + 1217461.

It is an arithmetic number, because the mean of its divisors is an integer number (25565274).

Almost surely, 2^165565516 is an apocalyptic number.

It is an amenable number.

165565516 is a deficient number, since it is larger than the sum of its proper divisors (141217772).

165565516 is a wasteful number, since it uses less digits than its factorization.

165565516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2434808 (or 2434806 counting only the distinct ones).

The product of its digits is 135000, while the sum is 40.

The square root of 165565516 is about 12867.2264299654. The cubic root of 165565516 is about 549.1065560482.

The spelling of 165565516 in words is "one hundred sixty-five million, five hundred sixty-five thousand, five hundred sixteen".