12666872 has 8 divisors (see below), whose sum is σ = 23750400. Its totient is φ = 6333432.

The previous prime is 12666851. The next prime is 12666877. The reversal of 12666872 is 27866621.

It is a happy number.

12666872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12666877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 791672 + ... + 791687.

It is an arithmetic number, because the mean of its divisors is an integer number (2968800).

Almost surely, 2^12666872 is an apocalyptic number.

It is an amenable number.

12666872 is a deficient number, since it is larger than the sum of its proper divisors (11083528).

12666872 is a wasteful number, since it uses less digits than its factorization.

12666872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1583365 (or 1583361 counting only the distinct ones).

The product of its digits is 48384, while the sum is 38.

The square root of 12666872 is about 3559.0549307365. The cubic root of 12666872 is about 233.1076148248.

The spelling of 12666872 in words is "twelve million, six hundred sixty-six thousand, eight hundred seventy-two".