6664256663 has 12 divisors (see below), whose sum is σ = 6761546064. Its totient is φ = 6567739200.

The previous prime is 6664256653. The next prime is 6664256681. The reversal of 6664256663 is 3666524666.

It is not a de Polignac number, because 6664256663 - 2⁸ = 6664256407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6664256603) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7563983 + ... + 7564863.

It is an arithmetic number, because the mean of its divisors is an integer number (563462172).

Almost surely, 2^6664256663 is an apocalyptic number.

6664256663 is a deficient number, since it is larger than the sum of its proper divisors (97289401).

6664256663 is an equidigital number, since it uses as much as digits as its factorization.

6664256663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1526 (or 1255 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 50.

The square root of 6664256663 is about 81634.8985606034. The cubic root of 6664256663 is about 1881.8452404003.

The spelling of 6664256663 in words is "six billion, six hundred sixty-four million, two hundred fifty-six thousand, six hundred sixty-three".