12775666 has 8 divisors (see below), whose sum is σ = 19210284. Its totient is φ = 6372240.

The previous prime is 12775663. The next prime is 12775691. The reversal of 12775666 is 66657721.

It is a happy number.

12775666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 12638025 + 137641 = 3555^2 + 371^2 .

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 (12775663) 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, 6745 + ... + 8428.

Almost surely, 2^12775666 is an apocalyptic number.

12775666 is a deficient number, since it is larger than the sum of its proper divisors (6434618).

12775666 is a wasteful number, since it uses less digits than its factorization.

12775666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15596.

The product of its digits is 105840, while the sum is 40.

The square root of 12775666 is about 3574.3063662758. The cubic root of 12775666 is about 233.7730895052.

The spelling of 12775666 in words is "twelve million, seven hundred seventy-five thousand, six hundred sixty-six".