6656996566 has 16 divisors (see below), whose sum is σ = 10940844240. Its totient is φ = 3012691680.

The previous prime is 6656996537. The next prime is 6656996581.

6656996566 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 6656996498 and 6656996507.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 655641 + ... + 665716.

It is an arithmetic number, because the mean of its divisors is an integer number (683802765).

Almost surely, 2^6656996566 is an apocalyptic number.

6656996566 is a deficient number, since it is larger than the sum of its proper divisors (4283847674).

6656996566 is a wasteful number, since it uses less digits than its factorization.

6656996566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1321599.

The product of its digits is 94478400, while the sum is 64.

The square root of 6656996566 is about 81590.4195723983. The cubic root of 6656996566 is about 1881.1616261088.

The spelling of 6656996566 in words is "six billion, six hundred fifty-six million, nine hundred ninety-six thousand, five hundred sixty-six".