12345566 has 8 divisors (see below), whose sum is σ = 18572760. Its totient is φ = 6154648.

The previous prime is 12345559. The next prime is 12345569. The reversal of 12345566 is 66554321.

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

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12345569) 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 3 ways as a sum of consecutive naturals, for example, 8201 + ... + 9588.

It is an arithmetic number, because the mean of its divisors is an integer number (2321595).

Almost surely, 2^12345566 is an apocalyptic number.

12345566 is a deficient number, since it is larger than the sum of its proper divisors (6227194).

12345566 is a wasteful number, since it uses less digits than its factorization.

12345566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18138.

The product of its digits is 21600, while the sum is 32.

The square root of 12345566 is about 3513.6257626560. The cubic root of 12345566 is about 231.1197195559.

Adding to 12345566 its reverse (66554321), we get a palindrome (78899887).

The spelling of 12345566 in words is "twelve million, three hundred forty-five thousand, five hundred sixty-six".