16663416 has 128 divisors (see below), whose sum is σ = 53084160. Its totient is φ = 4233600.

The previous prime is 16663397. The next prime is 16663421. The reversal of 16663416 is 61436661.

It is a Harshad number since it is a multiple of its sum of digits (33).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 131145 + ... + 131271.

It is an arithmetic number, because the mean of its divisors is an integer number (414720).

Almost surely, 2^16663416 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 16663416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26542080).

16663416 is an abundant number, since it is smaller than the sum of its proper divisors (36420744).

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

16663416 is a wasteful number, since it uses less digits than its factorization.

16663416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225 (or 221 counting only the distinct ones).

The product of its digits is 15552, while the sum is 33.

The square root of 16663416 is about 4082.0847614914. The cubic root of 16663416 is about 255.4198696079.

The spelling of 16663416 in words is "sixteen million, six hundred sixty-three thousand, four hundred sixteen".