12661408 has 24 divisors (see below), whose sum is σ = 26012448. Its totient is φ = 6055104.

The previous prime is 12661399. The next prime is 12661433. The reversal of 12661408 is 80416621.

It is a super-2 number, since 2×12661408² = 320622505084928, which contains 22 as substring.

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

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, 7866 + ... + 9337.

It is an arithmetic number, because the mean of its divisors is an integer number (1083852).

Almost surely, 2^12661408 is an apocalyptic number.

It is an amenable number.

12661408 is an abundant number, since it is smaller than the sum of its proper divisors (13351040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12661408 is a wasteful number, since it uses less digits than its factorization.

12661408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17236 (or 17228 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 12661408 is about 3558.2872284289. The cubic root of 12661408 is about 233.0740921263.

The spelling of 12661408 in words is "twelve million, six hundred sixty-one thousand, four hundred eight".