12668156669 has 8 divisors (see below), whose sum is σ = 14480978688. Its totient is φ = 10856106000.

The previous prime is 12668156663. The next prime is 12668156693. The reversal of 12668156669 is 96665186621.

It is a happy number.

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-12668156669 is a prime.

It is a super-2 number, since 2×12668156669² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12668156663) 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, 157202 + ... + 223715.

It is an arithmetic number, because the mean of its divisors is an integer number (1810122336).

Almost surely, 2^12668156669 is an apocalyptic number.

It is an amenable number.

12668156669 is a deficient number, since it is larger than the sum of its proper divisors (1812822019).

12668156669 is an equidigital number, since it uses as much as digits as its factorization.

12668156669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385675.

The product of its digits is 5598720, while the sum is 56.

The spelling of 12668156669 in words is "twelve billion, six hundred sixty-eight million, one hundred fifty-six thousand, six hundred sixty-nine".