664702053335243 has 16 divisors (see below), whose sum is σ = 828720519567360. Its totient is φ = 517948979169600.

The previous prime is 664702053335233. The next prime is 664702053335317. The reversal of 664702053335243 is 342533350207466.

It is not a de Polignac number, because 664702053335243 - 2²⁶ = 664701986226379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (664702053335233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58836998 + ... + 69218468.

It is an arithmetic number, because the mean of its divisors is an integer number (51795032472960).

Almost surely, 2^{664702053335243} is an apocalyptic number.

664702053335243 is a deficient number, since it is larger than the sum of its proper divisors (164018466232117).

664702053335243 is a wasteful number, since it uses less digits than its factorization.

664702053335243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11213018.

The product of its (nonzero) digits is 32659200, while the sum is 53.

The spelling of 664702053335243 in words is "six hundred sixty-four trillion, seven hundred two billion, fifty-three million, three hundred thirty-five thousand, two hundred forty-three".