12216066 has 16 divisors (see below), whose sum is σ = 24657600. Its totient is φ = 4034448.

The previous prime is 12216041. The next prime is 12216079. The reversal of 12216066 is 66061221.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 8686 + ... + 9993.

It is an arithmetic number, because the mean of its divisors is an integer number (1541100).

Almost surely, 2^12216066 is an apocalyptic number.

12216066 is an abundant number, since it is smaller than the sum of its proper divisors (12441534).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12216066 is a wasteful number, since it uses less digits than its factorization.

12216066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18793.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 12216066 is about 3495.1489238658. The cubic root of 12216066 is about 230.3087598679.

Adding to 12216066 its reverse (66061221), we get a palindrome (78277287).

The spelling of 12216066 in words is "twelve million, two hundred sixteen thousand, sixty-six".