664565501222713 has 2 divisors, whose sum is σ = 664565501222714. Its totient is φ = 664565501222712.

The previous prime is 664565501222683. The next prime is 664565501222773. The reversal of 664565501222713 is 317222105565466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 551275086645504 + 113290414577209 = 23479248^2 + 10643797^2 .

It is a cyclic number.

It is not a de Polignac number, because 664565501222713 - 2⁹ = 664565501222201 is a prime.

It is not a weakly prime, because it can be changed into another prime (664565501222773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332282750611356 + 332282750611357.

It is an arithmetic number, because the mean of its divisors is an integer number (332282750611357).

Almost surely, 2^{664565501222713} is an apocalyptic number.

It is an amenable number.

664565501222713 is a deficient number, since it is larger than the sum of its proper divisors (1).

664565501222713 is an equidigital number, since it uses as much as digits as its factorization.

664565501222713 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144000, while the sum is 55.

The spelling of 664565501222713 in words is "six hundred sixty-four trillion, five hundred sixty-five billion, five hundred one million, two hundred twenty-two thousand, seven hundred thirteen".