9666680866669 has 8 divisors (see below), whose sum is σ = 9895018934592. Its totient is φ = 9438503323200.

The previous prime is 9666680866637. The next prime is 9666680866691.

9666680866669 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 not a de Polignac number, because 9666680866669 - 2⁵ = 9666680866637 is a prime.

It is a super-2 number, since 2×9666680866669² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9666680866592 and 9666680866601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9666680866169) 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, 40009249 + ... + 40250134.

It is an arithmetic number, because the mean of its divisors is an integer number (1236877366824).

Almost surely, 2^{9666680866669} is an apocalyptic number.

It is an amenable number.

9666680866669 is a deficient number, since it is larger than the sum of its proper divisors (228338067923).

9666680866669 is a wasteful number, since it uses less digits than its factorization.

9666680866669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80262227.

The product of its (nonzero) digits is 8707129344, while the sum is 82.

The spelling of 9666680866669 in words is "nine trillion, six hundred sixty-six billion, six hundred eighty million, eight hundred sixty-six thousand, six hundred sixty-nine".