165223566 has 24 divisors (see below), whose sum is σ = 359325720. Its totient is φ = 54868176.

The previous prime is 165223549. The next prime is 165223573. The reversal of 165223566 is 665322561.

It is a happy number.

165223566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 165223566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12220 + ... + 21903.

It is an arithmetic number, because the mean of its divisors is an integer number (14971905).

Almost surely, 2^165223566 is an apocalyptic number.

165223566 is an abundant number, since it is smaller than the sum of its proper divisors (194102154).

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

165223566 is a wasteful number, since it uses less digits than its factorization.

165223566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34400 (or 34397 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 165223566 is about 12853.9319276243. The cubic root of 165223566 is about 548.7282639017.

The spelling of 165223566 in words is "one hundred sixty-five million, two hundred twenty-three thousand, five hundred sixty-six".