663564317 has 8 divisors (see below), whose sum is σ = 715338456. Its totient is φ = 611894592.

The previous prime is 663564311. The next prime is 663564337. The reversal of 663564317 is 713465366.

It can be written as a sum of positive squares in 4 ways, for example, as 303665476 + 359898841 = 17426^2 + 18971^2 .

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 663564317 - 2⁸ = 663564061 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 (663564311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12638 + ... + 38559.

It is an arithmetic number, because the mean of its divisors is an integer number (89417307).

Almost surely, 2^663564317 is an apocalyptic number.

It is an amenable number.

663564317 is a deficient number, since it is larger than the sum of its proper divisors (51774139).

663564317 is a wasteful number, since it uses less digits than its factorization.

663564317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52207.

The product of its digits is 272160, while the sum is 41.

The square root of 663564317 is about 25759.7421765048. The cubic root of 663564317 is about 872.2232812936.

The spelling of 663564317 in words is "six hundred sixty-three million, five hundred sixty-four thousand, three hundred seventeen".