12666404103 has 4 divisors (see below), whose sum is σ = 16888538808. Its totient is φ = 8444269400.

The previous prime is 12666404071. The next prime is 12666404119. The reversal of 12666404103 is 30140466621.

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 12666404103 - 2⁵ = 12666404071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12666404123) 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, 2111067348 + ... + 2111067353.

It is an arithmetic number, because the mean of its divisors is an integer number (4222134702).

Almost surely, 2^12666404103 is an apocalyptic number.

12666404103 is a deficient number, since it is larger than the sum of its proper divisors (4222134705).

12666404103 is an equidigital number, since it uses as much as digits as its factorization.

12666404103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4222134704.

The product of its (nonzero) digits is 20736, while the sum is 33.

The spelling of 12666404103 in words is "twelve billion, six hundred sixty-six million, four hundred four thousand, one hundred three".