16664576 has 48 divisors (see below), whose sum is σ = 34070400. Its totient is φ = 8146944.

The previous prime is 16664563. The next prime is 16664579. The reversal of 16664576 is 67546661.

It is a nialpdrome in base 8.

It is a zygodrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (16664579) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161741 + ... + 161843.

It is an arithmetic number, because the mean of its divisors is an integer number (709800).

Almost surely, 2^16664576 is an apocalyptic number.

16664576 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 16664576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17035200).

16664576 is an abundant number, since it is smaller than the sum of its proper divisors (17405824).

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

16664576 is an equidigital number, since it uses as much as digits as its factorization.

16664576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204 (or 184 counting only the distinct ones).

The product of its digits is 181440, while the sum is 41.

The square root of 16664576 is about 4082.2268432805. The cubic root of 16664576 is about 255.4257963673.

The spelling of 16664576 in words is "sixteen million, six hundred sixty-four thousand, five hundred seventy-six".