9866756828833 has 2 divisors, whose sum is σ = 9866756828834. Its totient is φ = 9866756828832.

The previous prime is 9866756828807. The next prime is 9866756828849. The reversal of 9866756828833 is 3388286576689.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7350323477904 + 2516433350929 = 2711148^2 + 1586327^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9866756828833 is a prime.

It is not a weakly prime, because it can be changed into another prime (9866756828933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4933378414416 + 4933378414417.

It is an arithmetic number, because the mean of its divisors is an integer number (4933378414417).

Almost surely, 2^{9866756828833} is an apocalyptic number.

It is an amenable number.

9866756828833 is a deficient number, since it is larger than the sum of its proper divisors (1).

9866756828833 is an equidigital number, since it uses as much as digits as its factorization.

9866756828833 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5016453120, while the sum is 79.

The spelling of 9866756828833 in words is "nine trillion, eight hundred sixty-six billion, seven hundred fifty-six million, eight hundred twenty-eight thousand, eight hundred thirty-three".