16650816 has 112 divisors (see below), whose sum is σ = 54278784. Its totient is φ = 4386816.

The previous prime is 16650811. The next prime is 16650817. The reversal of 16650816 is 61805661.

It is a tau number, because it is divible by the number of its divisors (112).

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a nialpdrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (16650811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16996 + ... + 17948.

It is an arithmetic number, because the mean of its divisors is an integer number (484632).

Almost surely, 2^16650816 is an apocalyptic number.

16650816 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 16650816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27139392).

16650816 is an abundant number, since it is smaller than the sum of its proper divisors (37627968).

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

16650816 is a wasteful number, since it uses less digits than its factorization.

16650816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988 (or 978 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 16650816 is about 4080.5411405842. The cubic root of 16650816 is about 255.3554750111.

The spelling of 16650816 in words is "sixteen million, six hundred fifty thousand, eight hundred sixteen".