16639

16639 is a number that falls between 16638 and 16640 in the sequence of natural numbers. It is an even number, as it is divisible by 2 without leaving a remainder. In the decimal numeral system, it is written as "sixteen thousand, six hundred thirty-nine."

The number 16639 is a composite number, meaning it has factors other than 1 and itself. Its prime factorization is 3 times 5547, indicating that it is the product of these two prime numbers. The number 16639 is also a Harshad number, also known as a Niven number, which means it is divisible by the sum of its digits (1+6+6+3+9=25).

In recreational mathematics, 16639 is known for being the smallest number that can be expressed as the sum of two cubes in two different ways: 16639 = 25^3 + 1^3 = 24^3 + 12^3. This property makes it an example of a taxicab number, a concept introduced by the mathematician G.H. Hardy.

The number 16639 does not hold any significant historical or cultural importance, and it is not associated with any notable events or figures. It is simply a number with interesting mathematical properties.