12660818 has 8 divisors (see below), whose sum is σ = 20108412. Its totient is φ = 5958016.

The previous prime is 12660811. The next prime is 12660827. The reversal of 12660818 is 81806621.

It can be written as a sum of positive squares in 2 ways, for example, as 11377129 + 1283689 = 3373^2 + 1133^2 .

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

It is not an unprimeable number, because it can be changed into a prime (12660811) 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, 186155 + ... + 186222.

Almost surely, 2^12660818 is an apocalyptic number.

12660818 is a deficient number, since it is larger than the sum of its proper divisors (7447594).

12660818 is a wasteful number, since it uses less digits than its factorization.

12660818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372396.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 12660818 is about 3558.2043224076. The cubic root of 12660818 is about 233.0704717851.

The spelling of 12660818 in words is "twelve million, six hundred sixty thousand, eight hundred eighteen".