216566111704 has 32 divisors (see below), whose sum is σ = 407512224720. Its totient is φ = 107896617856.

The previous prime is 216566111701. The next prime is 216566111737. The reversal of 216566111704 is 407111665612.

216566111704 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216566111701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4118442 + ... + 4170694.

Almost surely, 2^216566111704 is an apocalyptic number.

It is an amenable number.

216566111704 is a deficient number, since it is larger than the sum of its proper divisors (190946113016).

216566111704 is a wasteful number, since it uses less digits than its factorization.

216566111704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54099 (or 54095 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 40.

The spelling of 216566111704 in words is "two hundred sixteen billion, five hundred sixty-six million, one hundred eleven thousand, seven hundred four".