664376724 has 72 divisors (see below), whose sum is σ = 1928515680. Its totient is φ = 190728000.

The previous prime is 664376719. The next prime is 664376729. The reversal of 664376724 is 427673466.

664376724 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (664376719) and next prime (664376729).

It is a self number, because there is not a number n which added to its sum of digits gives 664376724.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664376729) 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, 36627 + ... + 51674.

It is an arithmetic number, because the mean of its divisors is an integer number (26784940).

Almost surely, 2^664376724 is an apocalyptic number.

It is an amenable number.

664376724 is an abundant number, since it is smaller than the sum of its proper divisors (1264138956).

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

664376724 is a wasteful number, since it uses less digits than its factorization.

664376724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88341 (or 88336 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 45.

The square root of 664376724 is about 25775.5062801878. The cubic root of 664376724 is about 872.5790927279.

The spelling of 664376724 in words is "six hundred sixty-four million, three hundred seventy-six thousand, seven hundred twenty-four".