216333660 has 24 divisors (see below), whose sum is σ = 605734416. Its totient is φ = 57688960.

The previous prime is 216333647. The next prime is 216333661. The reversal of 216333660 is 66333612.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216333661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1802721 + ... + 1802840.

It is an arithmetic number, because the mean of its divisors is an integer number (25238934).

Almost surely, 2^216333660 is an apocalyptic number.

216333660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216333660 is an abundant number, since it is smaller than the sum of its proper divisors (389400756).

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

216333660 is a wasteful number, since it uses less digits than its factorization.

216333660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3605573 (or 3605571 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 30.

The square root of 216333660 is about 14708.2854201297. The cubic root of 216333660 is about 600.3087855030.

The spelling of 216333660 in words is "two hundred sixteen million, three hundred thirty-three thousand, six hundred sixty".