9965055671 has 2 divisors, whose sum is σ = 9965055672. Its totient is φ = 9965055670.

The previous prime is 9965055649. The next prime is 9965055677. The reversal of 9965055671 is 1765505699.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9965055671 is a prime.

It is a super-2 number, since 2×9965055671² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9965055677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4982527835 + 4982527836.

It is an arithmetic number, because the mean of its divisors is an integer number (4982527836).

Almost surely, 2^9965055671 is an apocalyptic number.

9965055671 is a deficient number, since it is larger than the sum of its proper divisors (1).

9965055671 is an equidigital number, since it uses as much as digits as its factorization.

9965055671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2551500, while the sum is 53.

The square root of 9965055671 is about 99825.1254494579. The cubic root of 9965055671 is about 2151.9222520862.

The spelling of 9965055671 in words is "nine billion, nine hundred sixty-five million, fifty-five thousand, six hundred seventy-one".