665832 has 16 divisors (see below), whose sum is σ = 1664640. Its totient is φ = 221936.

The previous prime is 665813. The next prime is 665843. The reversal of 665832 is 238566.

It is a self number, because there is not a number n which added to its sum of digits gives 665832.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 665832.

It is an unprimeable number.

665832 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13848 + ... + 13895.

It is an arithmetic number, because the mean of its divisors is an integer number (104040).

2⁶⁶⁵⁸³² is an apocalyptic number.

It is an amenable number.

665832 is an abundant number, since it is smaller than the sum of its proper divisors (998808).

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

665832 is a wasteful number, since it uses less digits than its factorization.

665832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27752 (or 27748 counting only the distinct ones).

The product of its digits is 8640, while the sum is 30.

The square root of 665832 is about 815.9852939851. The cubic root of 665832 is about 87.3215738234.

The spelling of 665832 in words is "six hundred sixty-five thousand, eight hundred thirty-two".