218490166 has 16 divisors (see below), whose sum is σ = 333804528. Its totient is φ = 107229600.

The previous prime is 218490161. The next prime is 218490187. The reversal of 218490166 is 661094812.

It is a happy number.

218490166 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 (218490161) 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, 67096 + ... + 70276.

It is an arithmetic number, because the mean of its divisors is an integer number (20862783).

Almost surely, 2^218490166 is an apocalyptic number.

218490166 is a deficient number, since it is larger than the sum of its proper divisors (115314362).

218490166 is a wasteful number, since it uses less digits than its factorization.

218490166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3807.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 218490166 is about 14781.4128553396. The cubic root of 218490166 is about 602.2969050840.

The spelling of 218490166 in words is "two hundred eighteen million, four hundred ninety thousand, one hundred sixty-six".