12666272698 has 4 divisors (see below), whose sum is σ = 18999409050. Its totient is φ = 6333136348.

The previous prime is 12666272687. The next prime is 12666272699. The reversal of 12666272698 is 89627266621.

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

It can be written as a sum of positive squares in only one way, i.e., 9166722049 + 3499550649 = 95743^2 + 59157^2 .

It is not an unprimeable number, because it can be changed into a prime (12666272699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3166568173 + ... + 3166568176.

Almost surely, 2^12666272698 is an apocalyptic number.

12666272698 is a deficient number, since it is larger than the sum of its proper divisors (6333136352).

12666272698 is an equidigital number, since it uses as much as digits as its factorization.

12666272698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6333136351.

The product of its digits is 5225472, while the sum is 55.

The spelling of 12666272698 in words is "twelve billion, six hundred sixty-six million, two hundred seventy-two thousand, six hundred ninety-eight".