12345667679 has 4 divisors (see below), whose sum is σ = 12351851784. Its totient is φ = 12339483576.

The previous prime is 12345667661. The next prime is 12345667681. The reversal of 12345667679 is 97676654321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97676654321 = 82393 ⋅1185497.

It is a cyclic number.

It is not a de Polignac number, because 12345667679 - 2²⁰ = 12344619103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12345667379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3089057 + ... + 3093050.

It is an arithmetic number, because the mean of its divisors is an integer number (3087962946).

Almost surely, 2^12345667679 is an apocalyptic number.

12345667679 is a deficient number, since it is larger than the sum of its proper divisors (6184105).

12345667679 is an equidigital number, since it uses as much as digits as its factorization.

12345667679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6184104.

The product of its digits is 11430720, while the sum is 56.

The spelling of 12345667679 in words is "twelve billion, three hundred forty-five million, six hundred sixty-seven thousand, six hundred seventy-nine".