6688683837491 has 2 divisors, whose sum is σ = 6688683837492. Its totient is φ = 6688683837490.

The previous prime is 6688683837377. The next prime is 6688683837553. The reversal of 6688683837491 is 1947383868866.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6688683837491 - 2³⁰ = 6687610095667 is a prime.

It is not a weakly prime, because it can be changed into another prime (6688683837791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3344341918745 + 3344341918746.

It is an arithmetic number, because the mean of its divisors is an integer number (3344341918746).

Almost surely, 2^{6688683837491} is an apocalyptic number.

6688683837491 is a deficient number, since it is larger than the sum of its proper divisors (1).

6688683837491 is an equidigital number, since it uses as much as digits as its factorization.

6688683837491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2006581248, while the sum is 77.

The spelling of 6688683837491 in words is "six trillion, six hundred eighty-eight billion, six hundred eighty-three million, eight hundred thirty-seven thousand, four hundred ninety-one".