12345666666789 has 8 divisors (see below), whose sum is σ = 17327251462240. Its totient is φ = 7797263157936.

The previous prime is 12345666666779. The next prime is 12345666666797. The reversal of 12345666666789 is 98766666654321.

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

It is not a de Polignac number, because 12345666666789 - 2⁸ = 12345666666533 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 12345666666789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12345666666769) 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, 108295321582 + ... + 108295321695.

It is an arithmetic number, because the mean of its divisors is an integer number (2165906432780).

Almost surely, 2^{12345666666789} is an apocalyptic number.

12345666666789 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

12345666666789 is a deficient number, since it is larger than the sum of its proper divisors (4981584795451).

12345666666789 is a wasteful number, since it uses less digits than its factorization.

12345666666789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216590643299.

The product of its digits is 2821754880, while the sum is 75.

The spelling of 12345666666789 in words is "twelve trillion, three hundred forty-five billion, six hundred sixty-six million, six hundred sixty-six thousand, seven hundred eighty-nine".