218218220866 has 8 divisors (see below), whose sum is σ = 333503318844. Its totient is φ = 107050447920.

The previous prime is 218218220851. The next prime is 218218220933. The reversal of 218218220866 is 668022812812.

218218220866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 214068155625 + 4150065241 = 462675^2 + 64421^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1029331125 + ... + 1029331336.

Almost surely, 2^218218220866 is an apocalyptic number.

218218220866 is a deficient number, since it is larger than the sum of its proper divisors (115285097978).

218218220866 is a wasteful number, since it uses less digits than its factorization.

218218220866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2058662516.

The product of its (nonzero) digits is 294912, while the sum is 46.

The spelling of 218218220866 in words is "two hundred eighteen billion, two hundred eighteen million, two hundred twenty thousand, eight hundred sixty-six".