216066 has 8 divisors (see below), whose sum is σ = 432144. Its totient is φ = 72020.

The previous prime is 216061. The next prime is 216071. The reversal of 216066 is 660612.

It is an interprime number because it is at equal distance from previous prime (216061) and next prime (216071).

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

216066 is an admirable number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 216066.

It is not an unprimeable number, because it can be changed into a prime (216061) by changing a digit.

216066 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, 18000 + ... + 18011.

It is an arithmetic number, because the mean of its divisors is an integer number (54018).

216066 is a Friedman number, since it can be written as 66+60^(2+1), using all its digits and the basic arithmetic operations.

2²¹⁶⁰⁶⁶ is an apocalyptic number.

216066 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.

216066 is a wasteful number, since it uses less digits than its factorization.

216066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36016.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 216066 is about 464.8290008164. The cubic root of 216066 is about 60.0061104888.

Adding to 216066 its reverse (660612), we get a palindrome (876678).

It can be divided in two parts, 21606 and 6, that added together give a palindrome (21612).

The spelling of 216066 in words is "two hundred sixteen thousand, sixty-six".