664437112765313 has 4 divisors (see below), whose sum is σ = 693325682885568. Its totient is φ = 635548542645060.

The previous prime is 664437112765303. The next prime is 664437112765319. The reversal of 664437112765313 is 313567211734466.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 664437112765313 - 2¹⁸ = 664437112503169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664437112765319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14444285060093 + ... + 14444285060138.

It is an arithmetic number, because the mean of its divisors is an integer number (173331420721392).

Almost surely, 2^{664437112765313} is an apocalyptic number.

It is an amenable number.

664437112765313 is a deficient number, since it is larger than the sum of its proper divisors (28888570120255).

664437112765313 is a wasteful number, since it uses less digits than its factorization.

664437112765313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28888570120254.

The product of its digits is 45722880, while the sum is 59.

The spelling of 664437112765313 in words is "six hundred sixty-four trillion, four hundred thirty-seven billion, one hundred twelve million, seven hundred sixty-five thousand, three hundred thirteen".