16662216 has 16 divisors (see below), whose sum is σ = 41655600. Its totient is φ = 5554064.

The previous prime is 16662203. The next prime is 16662229. The reversal of 16662216 is 61226661.

It is an interprime number because it is at equal distance from previous prime (16662203) and next prime (16662229).

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 347106 + ... + 347153.

It is an arithmetic number, because the mean of its divisors is an integer number (2603475).

Almost surely, 2^16662216 is an apocalyptic number.

It is an amenable number.

16662216 is an abundant number, since it is smaller than the sum of its proper divisors (24993384).

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

16662216 is a wasteful number, since it uses less digits than its factorization.

16662216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694268 (or 694264 counting only the distinct ones).

The product of its digits is 5184, while the sum is 30.

The square root of 16662216 is about 4081.9377751259. The cubic root of 16662216 is about 255.4137381880.

Adding to 16662216 its reverse (61226661), we get a palindrome (77888877).

The spelling of 16662216 in words is "sixteen million, six hundred sixty-two thousand, two hundred sixteen".