66421

66421 is a number that falls between 66420 and 66422 in the sequence of natural numbers. It is an odd number, as it cannot be evenly divided by 2. In the decimal system, it is written as "sixty-six thousand, four hundred twenty-one." In Roman numerals, it is represented as LXVICCXXI. The number 66421 is also a composite number, meaning it has factors other than 1 and itself. Its prime factors are 3, 7, and 313. In mathematics, 66421 is notable for being a palindromic number in some bases, such as base 10 (66421) and base 16 (10401). It is also a Harshad number, meaning it is divisible by the sum of its digits (1+6+6+4+2+1=20). In computer science, 66421 is used as a port number in the Dynamic Host Configuration Protocol (DHCP) for the DHCPv6 client. In everyday life, 66421 might be used as a unique identifier, such as a product code or a serial number.