12771666 has 12 divisors (see below), whose sum is σ = 27671982. Its totient is φ = 4257216.

The previous prime is 12771653. The next prime is 12771679. The reversal of 12771666 is 66617721.

It is an interprime number because it is at equal distance from previous prime (12771653) and next prime (12771679).

It can be written as a sum of positive squares in only one way, i.e., 9455625 + 3316041 = 3075^2 + 1821^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 12771666.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 354751 + ... + 354786.

Almost surely, 2^12771666 is an apocalyptic number.

12771666 is an abundant number, since it is smaller than the sum of its proper divisors (14900316).

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

12771666 is a wasteful number, since it uses less digits than its factorization.

12771666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709545 (or 709542 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 12771666 is about 3573.7467733459. The cubic root of 12771666 is about 233.7486892126.

The spelling of 12771666 in words is "twelve million, seven hundred seventy-one thousand, six hundred sixty-six".