6681881866 has 16 divisors (see below), whose sum is σ = 10935309888. Its totient is φ = 3036852000.

The previous prime is 6681881863. The next prime is 6681881903.

6681881866 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 6681881866.

It is not an unprimeable number, because it can be changed into a prime (6681881863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 265171 + ... + 289273.

It is an arithmetic number, because the mean of its divisors is an integer number (683456868).

Almost surely, 2^6681881866 is an apocalyptic number.

6681881866 is a deficient number, since it is larger than the sum of its proper divisors (4253428022).

6681881866 is a wasteful number, since it uses less digits than its factorization.

6681881866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36717.

The product of its digits is 5308416, while the sum is 58.

The square root of 6681881866 is about 81742.7786779970. The cubic root of 6681881866 is about 1883.5027749570.

The spelling of 6681881866 in words is "six billion, six hundred eighty-one million, eight hundred eighty-one thousand, eight hundred sixty-six".