6680660866 has 16 divisors (see below), whose sum is σ = 10937602368. Its totient is φ = 3035105200.

The previous prime is 6680660821. The next prime is 6680660869.

6680660866 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (6680660869) 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, 33550 + ... + 120361.

It is an arithmetic number, because the mean of its divisors is an integer number (683600148).

Almost surely, 2^6680660866 is an apocalyptic number.

6680660866 is a deficient number, since it is larger than the sum of its proper divisors (4256941502).

6680660866 is a wasteful number, since it uses less digits than its factorization.

6680660866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155897.

The product of its (nonzero) digits is 2985984, while the sum is 52.

The square root of 6680660866 is about 81735.3097871416. The cubic root of 6680660866 is about 1883.3880419607.

The spelling of 6680660866 in words is "six billion, six hundred eighty million, six hundred sixty thousand, eight hundred sixty-six".