6681029791 has 2 divisors, whose sum is σ = 6681029792. Its totient is φ = 6681029790.

The previous prime is 6681029777. The next prime is 6681029807. The reversal of 6681029791 is 1979201866.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6681029791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6681029701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3340514895 + 3340514896.

It is an arithmetic number, because the mean of its divisors is an integer number (3340514896).

Almost surely, 2^6681029791 is an apocalyptic number.

6681029791 is a deficient number, since it is larger than the sum of its proper divisors (1).

6681029791 is an equidigital number, since it uses as much as digits as its factorization.

6681029791 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 49.

The square root of 6681029791 is about 81737.5665835484. The cubic root of 6681029791 is about 1883.4227099952.

The spelling of 6681029791 in words is "six billion, six hundred eighty-one million, twenty-nine thousand, seven hundred ninety-one".