16659216 has 120 divisors (see below), whose sum is σ = 55695840. Its totient is φ = 4753728.

The previous prime is 16659187. The next prime is 16659217. The reversal of 16659216 is 61295661.

16659216 is a `hidden beast` number, since 1 + 66 + 592 + 1 + 6 = 666.

16659216 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 (36).

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (16659217) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20775 + ... + 21561.

It is an arithmetic number, because the mean of its divisors is an integer number (464132).

Almost surely, 2^16659216 is an apocalyptic number.

16659216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16659216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27847920).

16659216 is an abundant number, since it is smaller than the sum of its proper divisors (39036624).

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

16659216 is a wasteful number, since it uses less digits than its factorization.

16659216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818 (or 799 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 16659216 is about 4081.5702860541. The cubic root of 16659216 is about 255.3984083502.

The spelling of 16659216 in words is "sixteen million, six hundred fifty-nine thousand, two hundred sixteen".