664235032 has 16 divisors (see below), whose sum is σ = 1299590640. Its totient is φ = 317677536.

The previous prime is 664235029. The next prime is 664235051. The reversal of 664235032 is 230532466.

It is a happy number.

664235032 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 664234985 and 664235003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1804803 + ... + 1805170.

It is an arithmetic number, because the mean of its divisors is an integer number (81224415).

Almost surely, 2^664235032 is an apocalyptic number.

It is an amenable number.

664235032 is a deficient number, since it is larger than the sum of its proper divisors (635355608).

664235032 is a wasteful number, since it uses less digits than its factorization.

664235032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3610002 (or 3609998 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 31.

The square root of 664235032 is about 25772.7575552171. The cubic root of 664235032 is about 872.5170565052.

Adding to 664235032 its reverse (230532466), we get a palindrome (894767498).

The spelling of 664235032 in words is "six hundred sixty-four million, two hundred thirty-five thousand, thirty-two".