12347666 has 4 divisors (see below), whose sum is σ = 18521502. Its totient is φ = 6173832.

The previous prime is 12347651. The next prime is 12347669. The reversal of 12347666 is 66674321.

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

It can be written as a sum of positive squares in only one way, i.e., 9211225 + 3136441 = 3035^2 + 1771^2 .

It is not an unprimeable number, because it can be changed into a prime (12347669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3086915 + ... + 3086918.

Almost surely, 2^12347666 is an apocalyptic number.

12347666 is a deficient number, since it is larger than the sum of its proper divisors (6173836).

12347666 is an equidigital number, since it uses as much as digits as its factorization.

12347666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6173835.

The product of its digits is 36288, while the sum is 35.

The square root of 12347666 is about 3513.9245865556. The cubic root of 12347666 is about 231.1328234210.

The spelling of 12347666 in words is "twelve million, three hundred forty-seven thousand, six hundred sixty-six".