12661344 has 36 divisors (see below), whose sum is σ = 36006516. Its totient is φ = 4220352.

The previous prime is 12661321. The next prime is 12661357. The reversal of 12661344 is 44316621.

12661344 is a `hidden beast` number, since 1 + 2 + 6 + 613 + 44 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21694 + ... + 22269.

It is an arithmetic number, because the mean of its divisors is an integer number (1000181).

Almost surely, 2^12661344 is an apocalyptic number.

It is an amenable number.

12661344 is an abundant number, since it is smaller than the sum of its proper divisors (23345172).

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

12661344 is a wasteful number, since it uses less digits than its factorization.

12661344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43979 (or 43968 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 12661344 is about 3558.2782353267. The cubic root of 12661344 is about 233.0736994168.

Adding to 12661344 its reverse (44316621), we get a palindrome (56977965).

The spelling of 12661344 in words is "twelve million, six hundred sixty-one thousand, three hundred forty-four".