664623350 has 12 divisors (see below), whose sum is σ = 1236199524. Its totient is φ = 265849320.

The previous prime is 664623343. The next prime is 664623359. The reversal of 664623350 is 53326466.

It is a self number, because there is not a number n which added to its sum of digits gives 664623350.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664623359) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6646184 + ... + 6646283.

It is an arithmetic number, because the mean of its divisors is an integer number (103016627).

Almost surely, 2^664623350 is an apocalyptic number.

664623350 is a deficient number, since it is larger than the sum of its proper divisors (571576174).

664623350 is a wasteful number, since it uses less digits than its factorization.

664623350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13292479 (or 13292474 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 35.

The square root of 664623350 is about 25780.2899518217. The cubic root of 664623350 is about 872.6870505880.

The spelling of 664623350 in words is "six hundred sixty-four million, six hundred twenty-three thousand, three hundred fifty".