216866183594027 has 64 divisors (see below), whose sum is σ = 251148725452800. Its totient is φ = 185428791744000.

The previous prime is 216866183593981. The next prime is 216866183594063. The reversal of 216866183594027 is 720495381668612.

It is a cyclic number.

It is not a de Polignac number, because 216866183594027 - 2⁴² = 212468137082923 is a prime.

It is a Smith number, since the sum of its digits (68) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216866183594227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8305535702 + ... + 8305561812.

It is an arithmetic number, because the mean of its divisors is an integer number (3924198835200).

It is a 1-persistent number, because it is pandigital, but 2⋅216866183594027 = 433732367188054 is not.

Almost surely, 2^{216866183594027} is an apocalyptic number.

216866183594027 is a deficient number, since it is larger than the sum of its proper divisors (34282541858773).

216866183594027 is a wasteful number, since it uses less digits than its factorization.

216866183594027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30308.

The product of its (nonzero) digits is 209018880, while the sum is 68.

The spelling of 216866183594027 in words is "two hundred sixteen trillion, eight hundred sixty-six billion, one hundred eighty-three million, five hundred ninety-four thousand, twenty-seven".