9766553221111 has 16 divisors (see below), whose sum is σ = 10114680280320. Its totient is φ = 9423939530880.

The previous prime is 9766553221069. The next prime is 9766553221127. The reversal of 9766553221111 is 1111223556679.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9766553221111 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9766553221211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69314550 + ... + 69455308.

It is an arithmetic number, because the mean of its divisors is an integer number (632167517520).

Almost surely, 2^{9766553221111} is an apocalyptic number.

9766553221111 is a deficient number, since it is larger than the sum of its proper divisors (348127059209).

9766553221111 is a wasteful number, since it uses less digits than its factorization.

9766553221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160326.

The product of its digits is 680400, while the sum is 49.

The spelling of 9766553221111 in words is "nine trillion, seven hundred sixty-six billion, five hundred fifty-three million, two hundred twenty-one thousand, one hundred eleven".