12667997379 has 4 divisors (see below), whose sum is σ = 16890663176. Its totient is φ = 8445331584.

The previous prime is 12667997371. The next prime is 12667997383. The reversal of 12667997379 is 97379976621.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12667997379 - 2³ = 12667997371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12667997371) 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, 2111332894 + ... + 2111332899.

It is an arithmetic number, because the mean of its divisors is an integer number (4222665794).

Almost surely, 2^12667997379 is an apocalyptic number.

12667997379 is a deficient number, since it is larger than the sum of its proper divisors (4222665797).

12667997379 is an equidigital number, since it uses as much as digits as its factorization.

12667997379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4222665796.

The product of its digits is 54010152, while the sum is 66.

The spelling of 12667997379 in words is "twelve billion, six hundred sixty-seven million, nine hundred ninety-seven thousand, three hundred seventy-nine".