664023344 has 10 divisors (see below), whose sum is σ = 1286545260. Its totient is φ = 332011664.

The previous prime is 664023341. The next prime is 664023377. The reversal of 664023344 is 443320466.

It is a super-3 number, since 3×664023344³ (a number of 27 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 664023344.

It is not an unprimeable number, because it can be changed into a prime (664023341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20750714 + ... + 20750745.

It is an arithmetic number, because the mean of its divisors is an integer number (128654526).

Almost surely, 2^664023344 is an apocalyptic number.

It is an amenable number.

664023344 is a deficient number, since it is larger than the sum of its proper divisors (622521916).

664023344 is a wasteful number, since it uses less digits than its factorization.

664023344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41501467 (or 41501461 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 32.

The square root of 664023344 is about 25768.6504109160. The cubic root of 664023344 is about 872.4243578838.

The spelling of 664023344 in words is "six hundred sixty-four million, twenty-three thousand, three hundred forty-four".