66568466486565 has 48 divisors (see below), whose sum is σ = 115427455947648. Its totient is φ = 35490226197888.

The previous prime is 66568466486531. The next prime is 66568466486581. The reversal of 66568466486565 is 56568466486566.

It is a happy number.

66568466486565 is a `hidden beast` number, since 6 + 6 + 5 + 6 + 8 + 4 + 6 + 6 + 48 + 6 + 565 = 666.

66568466486565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66568466486565 - 2¹³ = 66568466478373 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2183058459 + ... + 2183088951.

It is an arithmetic number, because the mean of its divisors is an integer number (2404738665576).

Almost surely, 2^{66568466486565} is an apocalyptic number.

It is an amenable number.

66568466486565 is a deficient number, since it is larger than the sum of its proper divisors (48858989461083).

66568466486565 is a wasteful number, since it uses less digits than its factorization.

66568466486565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46618 (or 46615 counting only the distinct ones).

The product of its digits is 35831808000, while the sum is 81.

Subtracting from 66568466486565 its reverse (56568466486566), we obtain a palindrome (9999999999999).

The spelling of 66568466486565 in words is "sixty-six trillion, five hundred sixty-eight billion, four hundred sixty-six million, four hundred eighty-six thousand, five hundred sixty-five".