12661326 has 32 divisors (see below), whose sum is σ = 28901280. Its totient is φ = 4105728.

The previous prime is 12661321. The next prime is 12661357. The reversal of 12661326 is 62316621.

12661326 is a `hidden beast` number, since 1 + 26 + 613 + 26 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

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

It is a self number, because there is not a number n which added to its sum of digits gives 12661326.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12661321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1171 + ... + 5166.

It is an arithmetic number, because the mean of its divisors is an integer number (903165).

Almost surely, 2^12661326 is an apocalyptic number.

12661326 is an abundant number, since it is smaller than the sum of its proper divisors (16239954).

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

12661326 is a wasteful number, since it uses less digits than its factorization.

12661326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6385 (or 6379 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 12661326 is about 3558.2757060127. The cubic root of 12661326 is about 233.0735889670.

Adding to 12661326 its reverse (62316621), we get a palindrome (74977947).

The spelling of 12661326 in words is "twelve million, six hundred sixty-one thousand, three hundred twenty-six".