664610656513 has 8 divisors (see below), whose sum is σ = 665123621600. Its totient is φ = 664097797440.

The previous prime is 664610656511. The next prime is 664610656543. The reversal of 664610656513 is 315656016466.

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 664610656513 - 2¹ = 664610656511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664610656511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16249513 + ... + 16290361.

It is an arithmetic number, because the mean of its divisors is an integer number (83140452700).

Almost surely, 2^664610656513 is an apocalyptic number.

It is an amenable number.

664610656513 is a deficient number, since it is larger than the sum of its proper divisors (512965087).

664610656513 is a wasteful number, since it uses less digits than its factorization.

664610656513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53007.

The product of its (nonzero) digits is 2332800, while the sum is 49.

The spelling of 664610656513 in words is "six hundred sixty-four billion, six hundred ten million, six hundred fifty-six thousand, five hundred thirteen".