16664256 has 84 divisors (see below), whose sum is σ = 54601872. Its totient is φ = 4760064.

The previous prime is 16664239. The next prime is 16664261. The reversal of 16664256 is 65246661.

It is a happy number.

16664256 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (84).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nialpdrome in base 8.

It is a zygodrome in base 8.

It is a self number, because there is not a number n which added to its sum of digits gives 16664256.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1966 + ... + 6098.

Almost surely, 2^16664256 is an apocalyptic number.

16664256 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 16664256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27300936).

16664256 is an abundant number, since it is smaller than the sum of its proper divisors (37937616).

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

16664256 is a wasteful number, since it uses less digits than its factorization.

16664256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4158 (or 4145 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 16664256 is about 4082.1876487981. The cubic root of 16664256 is about 255.4241614267.

The spelling of 16664256 in words is "sixteen million, six hundred sixty-four thousand, two hundred fifty-six".