12660386 has 4 divisors (see below), whose sum is σ = 18990582. Its totient is φ = 6330192.

The previous prime is 12660377. The next prime is 12660409. The reversal of 12660386 is 68306621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10686361 + 1974025 = 3269^2 + 1405^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3165095 + ... + 3165098.

Almost surely, 2^12660386 is an apocalyptic number.

12660386 is a deficient number, since it is larger than the sum of its proper divisors (6330196).

12660386 is an equidigital number, since it uses as much as digits as its factorization.

12660386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6330195.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 12660386 is about 3558.1436171127. The cubic root of 12660386 is about 233.0678208877.

The spelling of 12660386 in words is "twelve million, six hundred sixty thousand, three hundred eighty-six".