12660775 has 12 divisors (see below), whose sum is σ = 15849432. Its totient is φ = 10031840.

The previous prime is 12660763. The next prime is 12660779. The reversal of 12660775 is 57706621.

It is not a de Polignac number, because 12660775 - 2⁵ = 12660743 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12660775.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12660779) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 309 + ... + 5041.

It is an arithmetic number, because the mean of its divisors is an integer number (1320786).

Almost surely, 2^12660775 is an apocalyptic number.

12660775 is a deficient number, since it is larger than the sum of its proper divisors (3188657).

12660775 is a wasteful number, since it uses less digits than its factorization.

12660775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4850 (or 4845 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 12660775 is about 3558.1982800288. The cubic root of 12660775 is about 233.0702079253.

The spelling of 12660775 in words is "twelve million, six hundred sixty thousand, seven hundred seventy-five".