9876662666789 has 8 divisors (see below), whose sum is σ = 9894515455680. Its totient is φ = 9858810977856.

The previous prime is 9876662666771. The next prime is 9876662666809.

It is a happy number.

9876662666789 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9876662666789 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 9876662666789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9876662666729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18906269 + ... + 19421645.

It is an arithmetic number, because the mean of its divisors is an integer number (1236814431960).

Almost surely, 2^{9876662666789} is an apocalyptic number.

It is an amenable number.

9876662666789 is a deficient number, since it is larger than the sum of its proper divisors (17852788891).

9876662666789 is a wasteful number, since it uses less digits than its factorization.

9876662666789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549979.

The product of its digits is 23702740992, while the sum is 86.

The spelling of 9876662666789 in words is "nine trillion, eight hundred seventy-six billion, six hundred sixty-two million, six hundred sixty-six thousand, seven hundred eighty-nine".