6680699591 has 2 divisors, whose sum is σ = 6680699592. Its totient is φ = 6680699590.

The previous prime is 6680699561. The next prime is 6680699633. The reversal of 6680699591 is 1959960866.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6680699591 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6680699591.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6680699551) by changing a digit.

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 as a sum of consecutive naturals, namely, 3340349795 + 3340349796.

It is an arithmetic number, because the mean of its divisors is an integer number (3340349796).

Almost surely, 2^6680699591 is an apocalyptic number.

6680699591 is a deficient number, since it is larger than the sum of its proper divisors (1).

6680699591 is an equidigital number, since it uses as much as digits as its factorization.

6680699591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6298560, while the sum is 59.

The square root of 6680699591 is about 81735.5466795200. The cubic root of 6680699591 is about 1883.3916810249.

The spelling of 6680699591 in words is "six billion, six hundred eighty million, six hundred ninety-nine thousand, five hundred ninety-one".