9973336647881 has 2 divisors, whose sum is σ = 9973336647882. Its totient is φ = 9973336647880.

The previous prime is 9973336647877. The next prime is 9973336647887. The reversal of 9973336647881 is 1887466333799.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9973336647481 + 400 = 3158059^2 + 20^2 .

It is a cyclic number.

It is not a de Polignac number, because 9973336647881 - 2² = 9973336647877 is a prime.

It is a super-2 number, since 2×9973336647881² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9973336647799 and 9973336647808.

It is not a weakly prime, because it can be changed into another prime (9973336647887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4986668323940 + 4986668323941.

It is an arithmetic number, because the mean of its divisors is an integer number (4986668323941).

Almost surely, 2^{9973336647881} is an apocalyptic number.

It is an amenable number.

9973336647881 is a deficient number, since it is larger than the sum of its proper divisors (1).

9973336647881 is an equidigital number, since it uses as much as digits as its factorization.

9973336647881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 987614208, while the sum is 74.

The spelling of 9973336647881 in words is "nine trillion, nine hundred seventy-three billion, three hundred thirty-six million, six hundred forty-seven thousand, eight hundred eighty-one".