16662320 has 20 divisors (see below), whose sum is σ = 38740080. Its totient is φ = 6664896.

The previous prime is 16662319. The next prime is 16662341. The reversal of 16662320 is 2326661.

It is a tau number, because it is divible by the number of its divisors (20).

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 16662320.

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, 104060 + ... + 104219.

It is an arithmetic number, because the mean of its divisors is an integer number (1937004).

Almost surely, 2^16662320 is an apocalyptic number.

16662320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16662320 is an abundant number, since it is smaller than the sum of its proper divisors (22077760).

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

16662320 is a wasteful number, since it uses less digits than its factorization.

16662320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208292 (or 208286 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 16662320 is about 4081.9505141537. The cubic root of 16662320 is about 255.4142695894.

Adding to 16662320 its reverse (2326661), we get a palindrome (18988981).

The spelling of 16662320 in words is "sixteen million, six hundred sixty-two thousand, three hundred twenty".