165566432 has 12 divisors (see below), whose sum is σ = 325958976. Its totient is φ = 82783200.

The previous prime is 165566431. The next prime is 165566459. The reversal of 165566432 is 234665561.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165566431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2586944 + ... + 2587007.

It is an arithmetic number, because the mean of its divisors is an integer number (27163248).

Almost surely, 2^165566432 is an apocalyptic number.

It is an amenable number.

165566432 is a deficient number, since it is larger than the sum of its proper divisors (160392544).

165566432 is an equidigital number, since it uses as much as digits as its factorization.

165566432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5173961 (or 5173953 counting only the distinct ones).

The product of its digits is 129600, while the sum is 38.

The square root of 165566432 is about 12867.2620242226. The cubic root of 165566432 is about 549.1075687000.

The spelling of 165566432 in words is "one hundred sixty-five million, five hundred sixty-six thousand, four hundred thirty-two".