218847966 has 16 divisors (see below), whose sum is σ = 460732800. Its totient is φ = 69109848.

The previous prime is 218847961. The next prime is 218847973. The reversal of 218847966 is 669748812.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218847961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 959746 + ... + 959973.

It is an arithmetic number, because the mean of its divisors is an integer number (28795800).

Almost surely, 2^218847966 is an apocalyptic number.

218847966 is an abundant number, since it is smaller than the sum of its proper divisors (241884834).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

218847966 is a wasteful number, since it uses less digits than its factorization.

218847966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1919743.

The product of its digits is 1161216, while the sum is 51.

The square root of 218847966 is about 14793.5109423017. The cubic root of 218847966 is about 602.6255000471.

The spelling of 218847966 in words is "two hundred eighteen million, eight hundred forty-seven thousand, nine hundred sixty-six".