216663365 has 8 divisors (see below), whose sum is σ = 273680160. Its totient is φ = 164207952.

The previous prime is 216663361. The next prime is 216663383. The reversal of 216663365 is 563366612.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 216663365 - 2² = 216663361 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216663361) 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, 1140239 + ... + 1140428.

It is an arithmetic number, because the mean of its divisors is an integer number (34210020).

Almost surely, 2^216663365 is an apocalyptic number.

It is an amenable number.

216663365 is a deficient number, since it is larger than the sum of its proper divisors (57016795).

216663365 is a wasteful number, since it uses less digits than its factorization.

216663365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2280691.

The product of its digits is 116640, while the sum is 38.

The square root of 216663365 is about 14719.4892914123. The cubic root of 216663365 is about 600.6135991315.

The spelling of 216663365 in words is "two hundred sixteen million, six hundred sixty-three thousand, three hundred sixty-five".