16616 has 16 divisors (see below), whose sum is σ = 32640. Its totient is φ = 7920.

The previous prime is 16607. The next prime is 16619. The reversal of 16616 is 61661.

16616 = T₁₆ + T₁₇ + ... + T₄₆.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16619) by changing a digit.

16616 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215 + ... + 281.

It is an arithmetic number, because the mean of its divisors is an integer number (2040).

2¹⁶⁶¹⁶ is an apocalyptic number.

It is an amenable number.

16616 is a deficient number, since it is larger than the sum of its proper divisors (16024).

16616 is a wasteful number, since it uses less digits than its factorization.

16616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104 (or 100 counting only the distinct ones).

The product of its digits is 216, while the sum is 20.

The square root of 16616 is about 128.9030643546. The cubic root of 16616 is about 25.5177372430.

The spelling of 16616 in words is "sixteen thousand, six hundred sixteen".