12666448 has 20 divisors (see below), whose sum is σ = 24655540. Its totient is φ = 6303744.

The previous prime is 12666439. The next prime is 12666461. The reversal of 12666448 is 84466621.

It can be written as a sum of positive squares in 2 ways, for example, as 5419584 + 7246864 = 2328^2 + 2692^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1936 + ... + 5392.

It is an arithmetic number, because the mean of its divisors is an integer number (1232777).

Almost surely, 2^12666448 is an apocalyptic number.

It is an amenable number.

12666448 is a deficient number, since it is larger than the sum of its proper divisors (11989092).

12666448 is a wasteful number, since it uses less digits than its factorization.

12666448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3694 (or 3688 counting only the distinct ones).

The product of its digits is 55296, while the sum is 37.

The square root of 12666448 is about 3558.9953638632. The cubic root of 12666448 is about 233.1050138477.

The spelling of 12666448 in words is "twelve million, six hundred sixty-six thousand, four hundred forty-eight".