12661774 has 4 divisors (see below), whose sum is σ = 18992664. Its totient is φ = 6330886.

The previous prime is 12661769. The next prime is 12661783. The reversal of 12661774 is 47716621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47716621 = 397 ⋅120193.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3165442 + ... + 3165445.

It is an arithmetic number, because the mean of its divisors is an integer number (4748166).

Almost surely, 2^12661774 is an apocalyptic number.

12661774 is a deficient number, since it is larger than the sum of its proper divisors (6330890).

12661774 is an equidigital number, since it uses as much as digits as its factorization.

12661774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6330889.

The product of its digits is 14112, while the sum is 34.

The square root of 12661774 is about 3558.3386572950. The cubic root of 12661774 is about 233.0763379085.

The spelling of 12661774 in words is "twelve million, six hundred sixty-one thousand, seven hundred seventy-four".