664742350 has 48 divisors (see below), whose sum is σ = 1283623200. Its totient is φ = 255812480.

The previous prime is 664742249. The next prime is 664742359. The reversal of 664742350 is 53247466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664742359) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 519912 + ... + 521188.

It is an arithmetic number, because the mean of its divisors is an integer number (26742150).

Almost surely, 2^664742350 is an apocalyptic number.

664742350 is a deficient number, since it is larger than the sum of its proper divisors (618880850).

664742350 is a wasteful number, since it uses less digits than its factorization.

664742350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1677 (or 1672 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 37.

The square root of 664742350 is about 25782.5978132538. The cubic root of 664742350 is about 872.7391319970.

The spelling of 664742350 in words is "six hundred sixty-four million, seven hundred forty-two thousand, three hundred fifty".