216366 has 8 divisors (see below), whose sum is σ = 432744. Its totient is φ = 72120.

The previous prime is 216347. The next prime is 216371. The reversal of 216366 is 663612.

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

216366 is an admirable number.

It is a nude number because it is divisible by every one of its digits.

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 216366.

It is an unprimeable number.

216366 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18025 + ... + 18036.

It is an arithmetic number, because the mean of its divisors is an integer number (54093).

2²¹⁶³⁶⁶ is an apocalyptic number.

216366 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

216366 is a wasteful number, since it uses less digits than its factorization.

216366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36066.

The product of its digits is 1296, while the sum is 24.

The square root of 216366 is about 465.1515881946. The cubic root of 216366 is about 60.0338697659.

Adding to 216366 its reverse (663612), we get a palindrome (879978).

The spelling of 216366 in words is "two hundred sixteen thousand, three hundred sixty-six".