16665984 has 192 divisors, whose sum is σ = 54419040. Its totient is φ = 4866048.

The previous prime is 16665953. The next prime is 16666019. The reversal of 16665984 is 48956661.

16665984 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (192).

It is a zygodrome in base 8.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 450414 + ... + 450450.

Almost surely, 2^16665984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16665984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27209520).

16665984 is an abundant number, since it is smaller than the sum of its proper divisors (37753056).

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

16665984 is a wasteful number, since it uses less digits than its factorization.

16665984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97 (or 82 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 16665984 is about 4082.3992945326. The cubic root of 16665984 is about 255.4329898575.

The spelling of 16665984 in words is "sixteen million, six hundred sixty-five thousand, nine hundred eighty-four".