12666424 has 16 divisors (see below), whose sum is σ = 24302520. Its totient is φ = 6185760.

The previous prime is 12666421. The next prime is 12666427. The reversal of 12666424 is 42466621.

It is an interprime number because it is at equal distance from previous prime (12666421) and next prime (12666427).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12666421) 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, 18067 + ... + 18754.

Almost surely, 2^12666424 is an apocalyptic number.

It is an amenable number.

12666424 is a deficient number, since it is larger than the sum of its proper divisors (11636096).

12666424 is a wasteful number, since it uses less digits than its factorization.

12666424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36870 (or 36866 counting only the distinct ones).

The product of its digits is 13824, while the sum is 31.

The square root of 12666424 is about 3558.9919921236. The cubic root of 12666424 is about 233.1048666209.

The spelling of 12666424 in words is "twelve million, six hundred sixty-six thousand, four hundred twenty-four".