6680815823663 has 2 divisors, whose sum is σ = 6680815823664. Its totient is φ = 6680815823662.

The previous prime is 6680815823659. The next prime is 6680815823729. The reversal of 6680815823663 is 3663285180866.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6680815823663 - 2² = 6680815823659 is a prime.

It is a super-2 number, since 2×6680815823663² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6680815823596 and 6680815823605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6680815883663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3340407911831 + 3340407911832.

It is an arithmetic number, because the mean of its divisors is an integer number (3340407911832).

Almost surely, 2^{6680815823663} is an apocalyptic number.

6680815823663 is a deficient number, since it is larger than the sum of its proper divisors (1).

6680815823663 is an equidigital number, since it uses as much as digits as its factorization.

6680815823663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 59719680, while the sum is 62.

The spelling of 6680815823663 in words is "six trillion, six hundred eighty billion, eight hundred fifteen million, eight hundred twenty-three thousand, six hundred sixty-three".