9975764671 has 2 divisors, whose sum is σ = 9975764672. Its totient is φ = 9975764670.

The previous prime is 9975764641. The next prime is 9975764761. The reversal of 9975764671 is 1764675799.

Together with next prime (9975764761) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (1764675799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9975764671 - 2²⁷ = 9841546943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9975764621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4987882335 + 4987882336.

It is an arithmetic number, because the mean of its divisors is an integer number (4987882336).

Almost surely, 2^9975764671 is an apocalyptic number.

9975764671 is a deficient number, since it is larger than the sum of its proper divisors (1).

9975764671 is an equidigital number, since it uses as much as digits as its factorization.

9975764671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20003760, while the sum is 61.

The square root of 9975764671 is about 99878.7498470020. The cubic root of 9975764671 is about 2152.6928343409.

The spelling of 9975764671 in words is "nine billion, nine hundred seventy-five million, seven hundred sixty-four thousand, six hundred seventy-one".