66886688888866 has 32 divisors (see below), whose sum is σ = 128137692251520. Its totient is φ = 25424145283200.

The previous prime is 66886688888813. The next prime is 66886688888917. The reversal of 66886688888866 is 66888888668866.

It is a zygodrome in base 10.

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, 5296690621 + ... + 5296703248.

It is an arithmetic number, because the mean of its divisors is an integer number (4004302882860).

It is a self-describing number.

Almost surely, 2^{66886688888866} is an apocalyptic number.

66886688888866 is a deficient number, since it is larger than the sum of its proper divisors (61251003362654).

66886688888866 is a wasteful number, since it uses less digits than its factorization.

66886688888866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10593393930.

The product of its digits is 782757789696, while the sum is 100.

The spelling of 66886688888866 in words is "sixty-six trillion, eight hundred eighty-six billion, six hundred eighty-eight million, eight hundred eighty-eight thousand, eight hundred sixty-six".