6684315965866 has 16 divisors (see below), whose sum is σ = 12500538949440. Its totient is φ = 2604278947680.

The previous prime is 6684315965813. The next prime is 6684315965893. The reversal of 6684315965866 is 6685695134866.

It is a super-2 number, since 2×6684315965866² (a number of 26 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21702324411 + ... + 21702324718.

It is an arithmetic number, because the mean of its divisors is an integer number (781283684340).

Almost surely, 2^{6684315965866} is an apocalyptic number.

6684315965866 is a deficient number, since it is larger than the sum of its proper divisors (5816222983574).

6684315965866 is a wasteful number, since it uses less digits than its factorization.

6684315965866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43404649149.

The product of its digits is 1343692800, while the sum is 73.

The spelling of 6684315965866 in words is "six trillion, six hundred eighty-four billion, three hundred fifteen million, nine hundred sixty-five thousand, eight hundred sixty-six".