9666644413211 has 4 divisors (see below), whose sum is σ = 9789007000800. Its totient is φ = 9544281825624.

The previous prime is 9666644413193. The next prime is 9666644413249. The reversal of 9666644413211 is 1123144466669.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9666644413211 - 2³⁰ = 9665570671387 is a prime.

It is a super-2 number, since 2×9666644413211² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9666644463211) 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 in 3 ways as a sum of consecutive naturals, for example, 61181293676 + ... + 61181293833.

It is an arithmetic number, because the mean of its divisors is an integer number (2447251750200).

Almost surely, 2^{9666644413211} is an apocalyptic number.

9666644413211 is a deficient number, since it is larger than the sum of its proper divisors (122362587589).

9666644413211 is a wasteful number, since it uses less digits than its factorization.

9666644413211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122362587588.

The product of its digits is 4478976, while the sum is 53.

The spelling of 9666644413211 in words is "nine trillion, six hundred sixty-six billion, six hundred forty-four million, four hundred thirteen thousand, two hundred eleven".