12666010251 has 4 divisors (see below), whose sum is σ = 16888013672. Its totient is φ = 8444006832.

The previous prime is 12666010229. The next prime is 12666010271. The reversal of 12666010251 is 15201066621.

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

It is not a de Polignac number, because 12666010251 - 2⁶ = 12666010187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12666010271) 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, 2111001706 + ... + 2111001711.

It is an arithmetic number, because the mean of its divisors is an integer number (4222003418).

Almost surely, 2^12666010251 is an apocalyptic number.

12666010251 is a deficient number, since it is larger than the sum of its proper divisors (4222003421).

12666010251 is an equidigital number, since it uses as much as digits as its factorization.

12666010251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4222003420.

The product of its (nonzero) digits is 4320, while the sum is 30.

Adding to 12666010251 its reverse (15201066621), we get a palindrome (27867076872).

The spelling of 12666010251 in words is "twelve billion, six hundred sixty-six million, ten thousand, two hundred fifty-one".