16056666 has 24 divisors (see below), whose sum is σ = 35639604. Its totient is φ = 5221440.

The previous prime is 16056659. The next prime is 16056679. The reversal of 16056666 is 66665061.

It can be written as a sum of positive squares in 2 ways, for example, as 16040025 + 16641 = 4005^2 + 129^2 .

It is a zygodrome in base 4.

It is a self number, because there is not a number n which added to its sum of digits gives 16056666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10141 + ... + 11616.

Almost surely, 2^16056666 is an apocalyptic number.

16056666 is an abundant number, since it is smaller than the sum of its proper divisors (19582938).

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

16056666 is a wasteful number, since it uses less digits than its factorization.

16056666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21806 (or 21803 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 16056666 is about 4007.0769895274. The cubic root of 16056666 is about 252.2813373425.

The spelling of 16056666 in words is "sixteen million, fifty-six thousand, six hundred sixty-six".