6688270728866 has 16 divisors (see below), whose sum is σ = 10170260641728. Its totient is φ = 3298435638000.

The previous prime is 6688270728847. The next prime is 6688270728877.

6688270728866 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 6688270728793 and 6688270728802.

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, 62894120 + ... + 63000371.

It is an arithmetic number, because the mean of its divisors is an integer number (635641290108).

Almost surely, 2^{6688270728866} is an apocalyptic number.

6688270728866 is a deficient number, since it is larger than the sum of its proper divisors (3481989912862).

6688270728866 is a wasteful number, since it uses less digits than its factorization.

6688270728866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125894857.

The product of its (nonzero) digits is 1040449536, while the sum is 74.

The spelling of 6688270728866 in words is "six trillion, six hundred eighty-eight billion, two hundred seventy million, seven hundred twenty-eight thousand, eight hundred sixty-six".