664415736 has 32 divisors (see below), whose sum is σ = 1661679360. Its totient is φ = 221386592.

The previous prime is 664415707. The next prime is 664415737. The reversal of 664415736 is 637514466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664415737) 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, 104011 + ... + 110213.

It is an arithmetic number, because the mean of its divisors is an integer number (51927480).

Almost surely, 2^664415736 is an apocalyptic number.

It is an amenable number.

664415736 is an abundant number, since it is smaller than the sum of its proper divisors (997263624).

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

664415736 is a wasteful number, since it uses less digits than its factorization.

664415736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10675 (or 10671 counting only the distinct ones).

The product of its digits is 362880, while the sum is 42.

The square root of 664415736 is about 25776.2630340397. The cubic root of 664415736 is about 872.5961715870.

The spelling of 664415736 in words is "six hundred sixty-four million, four hundred fifteen thousand, seven hundred thirty-six".