12215666716 has 12 divisors (see below), whose sum is σ = 23320818360. Its totient is φ = 5552575760.

The previous prime is 12215666711. The next prime is 12215666717. The reversal of 12215666716 is 61766651221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12215666711) 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, 138814351 + ... + 138814438.

It is an arithmetic number, because the mean of its divisors is an integer number (1943401530).

Almost surely, 2^12215666716 is an apocalyptic number.

It is an amenable number.

12215666716 is a deficient number, since it is larger than the sum of its proper divisors (11105151644).

12215666716 is a wasteful number, since it uses less digits than its factorization.

12215666716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277628804 (or 277628802 counting only the distinct ones).

The product of its digits is 181440, while the sum is 43.

The spelling of 12215666716 in words is "twelve billion, two hundred fifteen million, six hundred sixty-six thousand, seven hundred sixteen".