9986668871 has 2 divisors, whose sum is σ = 9986668872. Its totient is φ = 9986668870.

The previous prime is 9986668829. The next prime is 9986668873. The reversal of 9986668871 is 1788666899.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9986668871 is a prime.

Together with 9986668873, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9986668873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4993334435 + 4993334436.

It is an arithmetic number, because the mean of its divisors is an integer number (4993334436).

Almost surely, 2^9986668871 is an apocalyptic number.

9986668871 is a deficient number, since it is larger than the sum of its proper divisors (1).

9986668871 is an equidigital number, since it uses as much as digits as its factorization.

9986668871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62705664, while the sum is 68.

The square root of 9986668871 is about 99933.3221253051. The cubic root of 9986668871 is about 2153.4768960641.

The spelling of 9986668871 in words is "nine billion, nine hundred eighty-six million, six hundred sixty-eight thousand, eight hundred seventy-one".