664752523 has 8 divisors (see below), whose sum is σ = 686457200. Its totient is φ = 643331808.

The previous prime is 664752521. The next prime is 664752533. The reversal of 664752523 is 325257466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 664752523 - 2¹ = 664752521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664752521) 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, 66228 + ... + 75601.

It is an arithmetic number, because the mean of its divisors is an integer number (85807150).

Almost surely, 2^664752523 is an apocalyptic number.

664752523 is a deficient number, since it is larger than the sum of its proper divisors (21704677).

664752523 is a wasteful number, since it uses less digits than its factorization.

664752523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141981.

The product of its digits is 302400, while the sum is 40.

The square root of 664752523 is about 25782.7950967307. The cubic root of 664752523 is about 872.7435840126.

The spelling of 664752523 in words is "six hundred sixty-four million, seven hundred fifty-two thousand, five hundred twenty-three".