12320544066666 has 32 divisors (see below), whose sum is σ = 26883450160128. Its totient is φ = 3733183881840.

The previous prime is 12320544066653. The next prime is 12320544066697. The reversal of 12320544066666 is 66666044502321.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7067520 + ... + 8636603.

It is an arithmetic number, because the mean of its divisors is an integer number (840107817504).

Almost surely, 2^{12320544066666} is an apocalyptic number.

12320544066666 is an abundant number, since it is smaller than the sum of its proper divisors (14562906093462).

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

12320544066666 is a wasteful number, since it uses less digits than its factorization.

12320544066666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15716026.

The product of its (nonzero) digits is 7464960, while the sum is 51.

Adding to 12320544066666 its reverse (66666044502321), we get a palindrome (78986588568987).

The spelling of 12320544066666 in words is "twelve trillion, three hundred twenty billion, five hundred forty-four million, sixty-six thousand, six hundred sixty-six".