12216662056 has 8 divisors (see below), whose sum is σ = 22906241370. Its totient is φ = 6108331024.

The previous prime is 12216662053. The next prime is 12216662057. The reversal of 12216662056 is 65026661221.

It can be written as a sum of positive squares in only one way, i.e., 8454802500 + 3761859556 = 91950^2 + 61334^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (12216662053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 763541371 + ... + 763541386.

Almost surely, 2^12216662056 is an apocalyptic number.

It is an amenable number.

12216662056 is a deficient number, since it is larger than the sum of its proper divisors (10689579314).

12216662056 is a wasteful number, since it uses less digits than its factorization.

12216662056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1527082763 (or 1527082759 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 12216662056 in words is "twelve billion, two hundred sixteen million, six hundred sixty-two thousand, fifty-six".