16659984 has 80 divisors (see below), whose sum is σ = 47496960. Its totient is φ = 4990080.

The previous prime is 16659971. The next prime is 16659991. The reversal of 16659984 is 48995661.

16659984 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73279 + ... + 73505.

It is an arithmetic number, because the mean of its divisors is an integer number (593712).

Almost surely, 2^16659984 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 16659984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23748480).

16659984 is an abundant number, since it is smaller than the sum of its proper divisors (30836976).

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

16659984 is a wasteful number, since it uses less digits than its factorization.

16659984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388 (or 382 counting only the distinct ones).

The product of its digits is 466560, while the sum is 48.

The square root of 16659984 is about 4081.6643664074. The cubic root of 16659984 is about 255.4023329639.

The spelling of 16659984 in words is "sixteen million, six hundred fifty-nine thousand, nine hundred eighty-four".