16671816 has 96 divisors (see below), whose sum is σ = 54350400. Its totient is φ = 4510080.

The previous prime is 16671791. The next prime is 16671821. The reversal of 16671816 is 61817661.

16671816 is digitally balanced in base 2 and base 4, because in such bases 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 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 23 ways as a sum of consecutive naturals, for example, 8706 + ... + 10446.

It is an arithmetic number, because the mean of its divisors is an integer number (566150).

Almost surely, 2^16671816 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 16671816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27175200).

16671816 is an abundant number, since it is smaller than the sum of its proper divisors (37678584).

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

16671816 is a wasteful number, since it uses less digits than its factorization.

16671816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1779 (or 1772 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 16671816 is about 4083.1135178929. The cubic root of 16671816 is about 255.4627813071.

The spelling of 16671816 in words is "sixteen million, six hundred seventy-one thousand, eight hundred sixteen".