13666456 has 8 divisors (see below), whose sum is σ = 25624620. Its totient is φ = 6833224.

The previous prime is 13666451. The next prime is 13666463. The reversal of 13666456 is 65466631.

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 (13666451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 854146 + ... + 854161.

Almost surely, 2^13666456 is an apocalyptic number.

It is an amenable number.

13666456 is a deficient number, since it is larger than the sum of its proper divisors (11958164).

13666456 is a wasteful number, since it uses less digits than its factorization.

13666456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1708313 (or 1708309 counting only the distinct ones).

The product of its digits is 77760, while the sum is 37.

The square root of 13666456 is about 3696.8170092662. The cubic root of 13666456 is about 239.0848015221.

The spelling of 13666456 in words is "thirteen million, six hundred sixty-six thousand, four hundred fifty-six".