165325566 has 32 divisors (see below), whose sum is σ = 378805248. Its totient is φ = 47121120.

The previous prime is 165325529. The next prime is 165325597. The reversal of 165325566 is 665523561.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13536 + ... + 22668.

It is an arithmetic number, because the mean of its divisors is an integer number (11837664).

Almost surely, 2^165325566 is an apocalyptic number.

165325566 is an abundant number, since it is smaller than the sum of its proper divisors (213479682).

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

165325566 is a wasteful number, since it uses less digits than its factorization.

165325566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9576.

The product of its digits is 162000, while the sum is 39.

The square root of 165325566 is about 12857.8989730049. The cubic root of 165325566 is about 548.8411589537.

The spelling of 165325566 in words is "one hundred sixty-five million, three hundred twenty-five thousand, five hundred sixty-six".