6656886566 has 16 divisors (see below), whose sum is σ = 10897208640. Its totient is φ = 3024712680.

The previous prime is 6656886563. The next prime is 6656886583.

6656886566 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 6656886499 and 6656886508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6656886563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3665 + ... + 115443.

It is an arithmetic number, because the mean of its divisors is an integer number (681075540).

Almost surely, 2^6656886566 is an apocalyptic number.

6656886566 is a deficient number, since it is larger than the sum of its proper divisors (4240322074).

6656886566 is a wasteful number, since it uses less digits than its factorization.

6656886566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114499.

The product of its digits is 74649600, while the sum is 62.

The square root of 6656886566 is about 81589.7454708617. The cubic root of 6656886566 is about 1881.1512646333.

The spelling of 6656886566 in words is "six billion, six hundred fifty-six million, eight hundred eighty-six thousand, five hundred sixty-six".