6636061640865 has 16 divisors (see below), whose sum is σ = 10818032563008. Its totient is φ = 3472454895936.

The previous prime is 6636061640849. The next prime is 6636061640909. The reversal of 6636061640865 is 5680461606366.

It is a happy number.

It is not a de Polignac number, because 6636061640865 - 2⁴ = 6636061640849 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4173622879 + ... + 4173624468.

It is an arithmetic number, because the mean of its divisors is an integer number (676127035188).

Almost surely, 2^{6636061640865} is an apocalyptic number.

It is an amenable number.

6636061640865 is a deficient number, since it is larger than the sum of its proper divisors (4181970922143).

6636061640865 is a wasteful number, since it uses less digits than its factorization.

6636061640865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8347247408.

The product of its (nonzero) digits is 22394880, while the sum is 57.

The spelling of 6636061640865 in words is "six trillion, six hundred thirty-six billion, sixty-one million, six hundred forty thousand, eight hundred sixty-five".