12511266667 has 4 divisors (see below), whose sum is σ = 12626049040. Its totient is φ = 12396484296.

The previous prime is 12511266643. The next prime is 12511266679. The reversal of 12511266667 is 76666211521.

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

It is a cyclic number.

It is not a de Polignac number, because 12511266667 - 2⁷ = 12511266539 is a prime.

It is a super-2 number, since 2×12511266667² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12511266767) 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, 57391023 + ... + 57391240.

It is an arithmetic number, because the mean of its divisors is an integer number (3156512260).

Almost surely, 2^12511266667 is an apocalyptic number.

12511266667 is a deficient number, since it is larger than the sum of its proper divisors (114782373).

12511266667 is a wasteful number, since it uses less digits than its factorization.

12511266667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114782372.

The product of its digits is 181440, while the sum is 43.

The spelling of 12511266667 in words is "twelve billion, five hundred eleven million, two hundred sixty-six thousand, six hundred sixty-seven".