664742360 has 32 divisors (see below), whose sum is σ = 1574391600. Its totient is φ = 251902080.

The previous prime is 664742359. The next prime is 664742369. The reversal of 664742360 is 63247466.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664742369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 436571 + ... + 438090.

Almost surely, 2^664742360 is an apocalyptic number.

It is an amenable number.

664742360 is an abundant number, since it is smaller than the sum of its proper divisors (909649240).

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

664742360 is a wasteful number, since it uses less digits than its factorization.

664742360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874691 (or 874687 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 38.

The square root of 664742360 is about 25782.5980071831. The cubic root of 664742360 is about 872.7391363733.

The spelling of 664742360 in words is "six hundred sixty-four million, seven hundred forty-two thousand, three hundred sixty".