9566016881 has 2 divisors, whose sum is σ = 9566016882. Its totient is φ = 9566016880.

The previous prime is 9566016877. The next prime is 9566016883. The reversal of 9566016881 is 1886106659.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7741360225 + 1824656656 = 87985^2 + 42716^2 .

It is a cyclic number.

It is not a de Polignac number, because 9566016881 - 2² = 9566016877 is a prime.

It is a super-2 number, since 2×9566016881² (a number of 21 digits) contains 22 as substring.

Together with 9566016883, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9566016883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4783008440 + 4783008441.

It is an arithmetic number, because the mean of its divisors is an integer number (4783008441).

Almost surely, 2^9566016881 is an apocalyptic number.

It is an amenable number.

9566016881 is a deficient number, since it is larger than the sum of its proper divisors (1).

9566016881 is an equidigital number, since it uses as much as digits as its factorization.

9566016881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 622080, while the sum is 50.

The square root of 9566016881 is about 97806.0165889604. The cubic root of 9566016881 is about 2122.8063641846.

The spelling of 9566016881 in words is "nine billion, five hundred sixty-six million, sixteen thousand, eight hundred eighty-one".