665612832 has 192 divisors, whose sum is σ = 1938795264. Its totient is φ = 199065600.

The previous prime is 665612821. The next prime is 665612833. The reversal of 665612832 is 238216566.

It is not an unprimeable number, because it can be changed into a prime (665612833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4407957 + ... + 4408107.

It is an arithmetic number, because the mean of its divisors is an integer number (10097892).

Almost surely, 2^665612832 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 665612832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (969397632).

665612832 is an abundant number, since it is smaller than the sum of its proper divisors (1273182432).

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

665612832 is a wasteful number, since it uses less digits than its factorization.

665612832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291 (or 283 counting only the distinct ones).

The product of its digits is 103680, while the sum is 39.

The square root of 665612832 is about 25799.4734829996. The cubic root of 665612832 is about 873.1199172916.

The spelling of 665612832 in words is "six hundred sixty-five million, six hundred twelve thousand, eight hundred thirty-two".