664042702263 has 16 divisors (see below), whose sum is σ = 907458794880. Its totient is φ = 431694464544.

The previous prime is 664042702249. The next prime is 664042702273. The reversal of 664042702263 is 362207240466.

664042702263 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-664042702263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664042702243) 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, 4119633 + ... + 4277786.

It is an arithmetic number, because the mean of its divisors is an integer number (56716174680).

Almost surely, 2^664042702263 is an apocalyptic number.

664042702263 is a deficient number, since it is larger than the sum of its proper divisors (243416092617).

664042702263 is a wasteful number, since it uses less digits than its factorization.

664042702263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8398078.

The product of its (nonzero) digits is 580608, while the sum is 42.

The spelling of 664042702263 in words is "six hundred sixty-four billion, forty-two million, seven hundred two thousand, two hundred sixty-three".