218023580066 has 4 divisors (see below), whose sum is σ = 327035370102. Its totient is φ = 109011790032.

The previous prime is 218023580053. The next prime is 218023580113. The reversal of 218023580066 is 660085320812.

218023580066 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 122724803041 + 95298777025 = 350321^2 + 308705^2 .

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 as a sum of consecutive naturals, namely, 54505895015 + ... + 54505895018.

Almost surely, 2^218023580066 is an apocalyptic number.

218023580066 is a deficient number, since it is larger than the sum of its proper divisors (109011790036).

218023580066 is a wasteful number, since it uses less digits than its factorization.

218023580066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109011790035.

The product of its (nonzero) digits is 138240, while the sum is 41.

The spelling of 218023580066 in words is "two hundred eighteen billion, twenty-three million, five hundred eighty thousand, sixty-six".