12345666679 has 8 divisors (see below), whose sum is σ = 13425177168. Its totient is φ = 11305411200.

The previous prime is 12345666677. The next prime is 12345666721. The reversal of 12345666679 is 97666654321.

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 not a de Polignac number, because 12345666679 - 2¹ = 12345666677 is a prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12345666677) 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, 9813097 + ... + 9814354.

It is an arithmetic number, because the mean of its divisors is an integer number (1678147146).

Almost surely, 2^12345666679 is an apocalyptic number.

12345666679 is a deficient number, since it is larger than the sum of its proper divisors (1079510489).

12345666679 is a wasteful number, since it uses less digits than its factorization.

12345666679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19627505.

The product of its digits is 9797760, while the sum is 55.

The spelling of 12345666679 in words is "twelve billion, three hundred forty-five million, six hundred sixty-six thousand, six hundred seventy-nine".