16659642 has 16 divisors (see below), whose sum is σ = 33389280. Its totient is φ = 5541552.

The previous prime is 16659641. The next prime is 16659673. The reversal of 16659642 is 24695661.

It is a self number, because there is not a number n which added to its sum of digits gives 16659642.

It is not an unprimeable number, because it can be changed into a prime (16659641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 484 + ... + 5792.

It is an arithmetic number, because the mean of its divisors is an integer number (2086830).

Almost surely, 2^16659642 is an apocalyptic number.

16659642 is an abundant number, since it is smaller than the sum of its proper divisors (16729638).

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

16659642 is a wasteful number, since it uses less digits than its factorization.

16659642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5837.

The product of its digits is 77760, while the sum is 39.

The square root of 16659642 is about 4081.6224715179. The cubic root of 16659642 is about 255.4005852993.

The spelling of 16659642 in words is "sixteen million, six hundred fifty-nine thousand, six hundred forty-two".