664535244 has 48 divisors (see below), whose sum is σ = 1629571328. Its totient is φ = 210506688.

The previous prime is 664535243. The next prime is 664535269. The reversal of 664535244 is 442535466.

It is not an unprimeable number, because it can be changed into a prime (664535243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1689 + ... + 36495.

Almost surely, 2^664535244 is an apocalyptic number.

It is an amenable number.

664535244 is an abundant number, since it is smaller than the sum of its proper divisors (965036084).

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

664535244 is a wasteful number, since it uses less digits than its factorization.

664535244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34894 (or 34892 counting only the distinct ones).

The product of its digits is 345600, while the sum is 39.

The square root of 664535244 is about 25778.5811091301. The cubic root of 664535244 is about 872.6484862076.

The spelling of 664535244 in words is "six hundred sixty-four million, five hundred thirty-five thousand, two hundred forty-four".