16065664 has 32 divisors (see below), whose sum is σ = 32188140. Its totient is φ = 7987200.

The previous prime is 16065649. The next prime is 16065671. The reversal of 16065664 is 46656061.

It can be written as a sum of positive squares in 2 ways, for example, as 16064064 + 1600 = 4008^2 + 40^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a nialpdrome in base 8.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39864 + ... + 40264.

Almost surely, 2^16065664 is an apocalyptic number.

It is an amenable number.

16065664 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

16065664 is an equidigital number, since it uses as much as digits as its factorization.

16065664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728 (or 716 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 16065664 is about 4008.1995958285. The cubic root of 16065664 is about 252.3284538812.

The spelling of 16065664 in words is "sixteen million, sixty-five thousand, six hundred sixty-four".