9885664673 has 2 divisors, whose sum is σ = 9885664674. Its totient is φ = 9885664672.

The previous prime is 9885664627. The next prime is 9885664703. The reversal of 9885664673 is 3764665889.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9356112529 + 529552144 = 96727^2 + 23012^2 .

It is a cyclic number.

It is not a de Polignac number, because 9885664673 - 2²⁰ = 9884616097 is a prime.

It is not a weakly prime, because it can be changed into another prime (9885664273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4942832336 + 4942832337.

It is an arithmetic number, because the mean of its divisors is an integer number (4942832337).

Almost surely, 2^9885664673 is an apocalyptic number.

It is an amenable number.

9885664673 is a deficient number, since it is larger than the sum of its proper divisors (1).

9885664673 is an equidigital number, since it uses as much as digits as its factorization.

9885664673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52254720, while the sum is 62.

The square root of 9885664673 is about 99426.6798852300. The cubic root of 9885664673 is about 2146.1922632462.

The spelling of 9885664673 in words is "nine billion, eight hundred eighty-five million, six hundred sixty-four thousand, six hundred seventy-three".