9766555543321 has 8 divisors (see below), whose sum is σ = 9786929623200. Its totient is φ = 9746196290880.

The previous prime is 9766555543309. The next prime is 9766555543343. The reversal of 9766555543321 is 1233455556679.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9766555543321 - 2¹¹ = 9766555541273 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 9766555543321.

It is not an unprimeable number, because it can be changed into a prime (9766555543391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2387635 + ... + 5023336.

It is an arithmetic number, because the mean of its divisors is an integer number (1223366202900).

Almost surely, 2^{9766555543321} is an apocalyptic number.

It is an amenable number.

9766555543321 is a deficient number, since it is larger than the sum of its proper divisors (20374079879).

9766555543321 is a wasteful number, since it uses less digits than its factorization.

9766555543321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7413719.

The product of its digits is 102060000, while the sum is 61.

The spelling of 9766555543321 in words is "nine trillion, seven hundred sixty-six billion, five hundred fifty-five million, five hundred forty-three thousand, three hundred twenty-one".