16606 has 12 divisors (see below), whose sum is σ = 27432. Its totient is φ = 7524.

The previous prime is 16603. The next prime is 16607. The reversal of 16606 is 60661.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 711 + ... + 733.

It is an arithmetic number, because the mean of its divisors is an integer number (2286).

2¹⁶⁶⁰⁶ is an apocalyptic number.

16606 is the 82-nd centered pentagonal number.

16606 is a deficient number, since it is larger than the sum of its proper divisors (10826).

16606 is a wasteful number, since it uses less digits than its factorization.

16606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63 (or 44 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 16606 is about 128.8642696794. The cubic root of 16606 is about 25.5126171062.

The spelling of 16606 in words is "sixteen thousand, six hundred six".