165232566 has 24 divisors (see below), whose sum is σ = 361552464. Its totient is φ = 54531600.

The previous prime is 165232559. The next prime is 165232567. The reversal of 165232566 is 665232561.

It is a happy number.

165232566 is a `hidden beast` number, since 1 + 65 + 2 + 32 + 566 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 165232566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165232567) 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, 43626 + ... + 47261.

It is an arithmetic number, because the mean of its divisors is an integer number (15064686).

Almost surely, 2^165232566 is an apocalyptic number.

165232566 is an abundant number, since it is smaller than the sum of its proper divisors (196319898).

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

165232566 is a wasteful number, since it uses less digits than its factorization.

165232566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90996 (or 90993 counting only the distinct ones).

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

The square root of 165232566 is about 12854.2820102875. The cubic root of 165232566 is about 548.7382270985.

The spelling of 165232566 in words is "one hundred sixty-five million, two hundred thirty-two thousand, five hundred sixty-six".