664363744 has 48 divisors (see below), whose sum is σ = 1429248240. Its totient is φ = 301480960.

The previous prime is 664363727. The next prime is 664363751. The reversal of 664363744 is 447363466.

It is a self number, because there is not a number n which added to its sum of digits gives 664363744.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 283602 + ... + 285934.

It is an arithmetic number, because the mean of its divisors is an integer number (29776005).

Almost surely, 2^664363744 is an apocalyptic number.

It is an amenable number.

664363744 is an abundant number, since it is smaller than the sum of its proper divisors (764884496).

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

664363744 is a wasteful number, since it uses less digits than its factorization.

664363744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3163 (or 3155 counting only the distinct ones).

The product of its digits is 870912, while the sum is 43.

The square root of 664363744 is about 25775.2544895293. The cubic root of 664363744 is about 872.5734101335.

The spelling of 664363744 in words is "six hundred sixty-four million, three hundred sixty-three thousand, seven hundred forty-four".