12666747 has 8 divisors (see below), whose sum is σ = 17079120. Its totient is φ = 8349440.

The previous prime is 12666727. The next prime is 12666763. The reversal of 12666747 is 74766621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12666747 - 2¹¹ = 12664699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12666727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23454 + ... + 23987.

It is an arithmetic number, because the mean of its divisors is an integer number (2134890).

Almost surely, 2^12666747 is an apocalyptic number.

12666747 is a deficient number, since it is larger than the sum of its proper divisors (4412373).

12666747 is an equidigital number, since it uses as much as digits as its factorization.

12666747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47533.

The product of its digits is 84672, while the sum is 39.

The square root of 12666747 is about 3559.0373698516. The cubic root of 12666747 is about 233.1068480333.

The spelling of 12666747 in words is "twelve million, six hundred sixty-six thousand, seven hundred forty-seven".