665635432 has 128 divisors (see below), whose sum is σ = 1614090240. Its totient is φ = 249857280.

The previous prime is 665635403. The next prime is 665635457. The reversal of 665635432 is 234536566.

665635432 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2402878 + ... + 2403154.

It is an arithmetic number, because the mean of its divisors is an integer number (12610080).

Almost surely, 2^665635432 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 665635432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (807045120).

665635432 is an abundant number, since it is smaller than the sum of its proper divisors (948454808).

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

665635432 is a wasteful number, since it uses less digits than its factorization.

665635432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431 (or 427 counting only the distinct ones).

The product of its digits is 388800, while the sum is 40.

The square root of 665635432 is about 25799.9114727163. The cubic root of 665635432 is about 873.1297990556.

The spelling of 665635432 in words is "six hundred sixty-five million, six hundred thirty-five thousand, four hundred thirty-two".