12666340 has 12 divisors (see below), whose sum is σ = 26599356. Its totient is φ = 5066528.

The previous prime is 12666299. The next prime is 12666347. The reversal of 12666340 is 4366621.

It can be written as a sum of positive squares in 2 ways, for example, as 2477476 + 10188864 = 1574^2 + 3192^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12666299 and 12666308.

It is not an unprimeable number, because it can be changed into a prime (12666347) 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, 316639 + ... + 316678.

It is an arithmetic number, because the mean of its divisors is an integer number (2216613).

Almost surely, 2^12666340 is an apocalyptic number.

12666340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12666340 is an abundant number, since it is smaller than the sum of its proper divisors (13933016).

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

12666340 is a wasteful number, since it uses less digits than its factorization.

12666340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633326 (or 633324 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 12666340 is about 3558.9801910098. The cubic root of 12666340 is about 233.1043513254.

It can be divided in two parts, 126 and 66340, that added together give a palindrome (66466).

The spelling of 12666340 in words is "twelve million, six hundred sixty-six thousand, three hundred forty".