6681331866 has 32 divisors (see below), whose sum is σ = 15080126400. Its totient is φ = 1954830080.

The previous prime is 6681331861. The next prime is 6681331883.

6681331866 is nontrivially palindromic in base 10.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6681331861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1743471 + ... + 1747298.

It is an arithmetic number, because the mean of its divisors is an integer number (471253950).

Almost surely, 2^6681331866 is an apocalyptic number.

6681331866 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

6681331866 is an abundant number, since it is smaller than the sum of its proper divisors (8398794534).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6681331866 is a wasteful number, since it uses less digits than its factorization.

6681331866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3490814.

The product of its digits is 746496, while the sum is 48.

The square root of 6681331866 is about 81739.4143972172. The cubic root of 6681331866 is about 1883.4510951573.

The spelling of 6681331866 in words is "six billion, six hundred eighty-one million, three hundred thirty-one thousand, eight hundred sixty-six".