12665838 has 8 divisors (see below), whose sum is σ = 25331688. Its totient is φ = 4221944.

The previous prime is 12665827. The next prime is 12665839. The reversal of 12665838 is 83856621.

It is a happy number.

12665838 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

12665838 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 12665796 and 12665805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12665839) 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, 1055481 + ... + 1055492.

It is an arithmetic number, because the mean of its divisors is an integer number (3166461).

Almost surely, 2^12665838 is an apocalyptic number.

12665838 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12665838 is a wasteful number, since it uses less digits than its factorization.

12665838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2110978.

The product of its digits is 69120, while the sum is 39.

The square root of 12665838 is about 3558.9096644900. The cubic root of 12665838 is about 233.1012717741.

The spelling of 12665838 in words is "twelve million, six hundred sixty-five thousand, eight hundred thirty-eight".