216660908812 has 12 divisors (see below), whose sum is σ = 379333533376. Its totient is φ = 108279899280.

The previous prime is 216660908773. The next prime is 216660908819. The reversal of 216660908812 is 218809066612.

216660908812 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (216660908819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12629139 + ... + 12646282.

Almost surely, 2^216660908812 is an apocalyptic number.

It is an amenable number.

216660908812 is a deficient number, since it is larger than the sum of its proper divisors (162672624564).

216660908812 is a wasteful number, since it uses less digits than its factorization.

216660908812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25277568 (or 25277566 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 49.

The spelling of 216660908812 in words is "two hundred sixteen billion, six hundred sixty million, nine hundred eight thousand, eight hundred twelve".