664503583 has 4 divisors (see below), whose sum is σ = 664815808. Its totient is φ = 664191360.

The previous prime is 664503563. The next prime is 664503589. The reversal of 664503583 is 385305466.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-664503583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664503589) 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 3 ways as a sum of consecutive naturals, for example, 152898 + ... + 157183.

It is an arithmetic number, because the mean of its divisors is an integer number (166203952).

Almost surely, 2^664503583 is an apocalyptic number.

664503583 is a deficient number, since it is larger than the sum of its proper divisors (312225).

664503583 is a wasteful number, since it uses less digits than its factorization.

664503583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312224.

The product of its (nonzero) digits is 259200, while the sum is 40.

The square root of 664503583 is about 25777.9670067288. The cubic root of 664503583 is about 872.6346272173.

The spelling of 664503583 in words is "six hundred sixty-four million, five hundred three thousand, five hundred eighty-three".