664605313 has 8 divisors (see below), whose sum is σ = 704927520. Its totient is φ = 624817440.

The previous prime is 664605299. The next prime is 664605353. The reversal of 664605313 is 313506466.

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 664605313 - 2⁵ = 664605281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664605353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131020 + ... + 135997.

It is an arithmetic number, because the mean of its divisors is an integer number (88115940).

Almost surely, 2^664605313 is an apocalyptic number.

It is an amenable number.

664605313 is a deficient number, since it is larger than the sum of its proper divisors (40322207).

664605313 is a wasteful number, since it uses less digits than its factorization.

664605313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267167.

The product of its (nonzero) digits is 38880, while the sum is 34.

The square root of 664605313 is about 25779.9401279367. The cubic root of 664605313 is about 872.6791559919.

The spelling of 664605313 in words is "six hundred sixty-four million, six hundred five thousand, three hundred thirteen".