12660787 has 4 divisors (see below), whose sum is σ = 13211280. Its totient is φ = 12110296.

The previous prime is 12660779. The next prime is 12660793. The reversal of 12660787 is 78706621.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 12660787 - 2³ = 12660779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12660797) 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, 275212 + ... + 275257.

It is an arithmetic number, because the mean of its divisors is an integer number (3302820).

Almost surely, 2^12660787 is an apocalyptic number.

12660787 is a deficient number, since it is larger than the sum of its proper divisors (550493).

12660787 is an equidigital number, since it uses as much as digits as its factorization.

12660787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550492.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 12660787 is about 3558.1999662751. The cubic root of 12660787 is about 233.0702815607.

The spelling of 12660787 in words is "twelve million, six hundred sixty thousand, seven hundred eighty-seven".