664551561105239 has 2 divisors, whose sum is σ = 664551561105240. Its totient is φ = 664551561105238.

The previous prime is 664551561105193. The next prime is 664551561105259. The reversal of 664551561105239 is 932501165155466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 664551561105239 - 2²⁰ = 664551560056663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664551561105259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332275780552619 + 332275780552620.

It is an arithmetic number, because the mean of its divisors is an integer number (332275780552620).

Almost surely, 2^{664551561105239} is an apocalyptic number.

664551561105239 is a deficient number, since it is larger than the sum of its proper divisors (1).

664551561105239 is an equidigital number, since it uses as much as digits as its factorization.

664551561105239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29160000, while the sum is 59.

The spelling of 664551561105239 in words is "six hundred sixty-four trillion, five hundred fifty-one billion, five hundred sixty-one million, one hundred five thousand, two hundred thirty-nine".