16666616 has 16 divisors (see below), whose sum is σ = 31560840. Its totient is φ = 8250400.

The previous prime is 16666609. The next prime is 16666621. The reversal of 16666616 is 61666661.

It is a self number, because there is not a number n which added to its sum of digits gives 16666616.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9506 + ... + 11121.

Almost surely, 2^16666616 is an apocalyptic number.

It is an amenable number.

16666616 is a deficient number, since it is larger than the sum of its proper divisors (14894224).

16666616 is a wasteful number, since it uses less digits than its factorization.

16666616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20734 (or 20730 counting only the distinct ones).

The product of its digits is 46656, while the sum is 38.

The square root of 16666616 is about 4082.4766992599. The cubic root of 16666616 is about 255.4362186220.

The spelling of 16666616 in words is "sixteen million, six hundred sixty-six thousand, six hundred sixteen".