WON plate98 | World!OfNumbers Integer 6643 joins the World!Of Palindromes ! but not through our trustworthy base 10 numbersystem since ... we first have to convert the number into base 9 before we can reveal the hidden beauty ! 66431 = 10101{9} 66432 = 102030201{9} 66433 = 1030607060301{9} and that  101013 = 1020302013/2 = 10306070603011 in base 10 ! Moreover 6643 is also palindromic in the following bases 6643 = 10101{9} 6643 = 100010001{3} 6643 = 1100111110011{2} The digits of 6643 are in descending order. If we do the same with its prime factors 7, 13 and 73 we get 6643 = 73 x 13 x 7 or when concatenated we get the palindrome 73137 Multiplicand 6643 smallest multiplier to arrive at a palindromic product is... another palindrome 6643 x 44 = 292292 A connection with palindrome 3773 The smallest probable prime (prp) larger than 103773 is 103773 + 6643 Here follows a list of borderprp's with nonpalindromic exponents included : 103159 + 6643 103773 + 6643 107011 + 6643 Can you help extend the list of 6643 written out in various languages ? [Dutch] Zesduizendzeshonderddrieënveertig [English] Six thousand six hundred and forty three [French] Six mille six cent quarante trois [German]--- [Italian]--- [Spanish] Seis mil seiscientos cuarenta y tres [Other]--- [ August 22, 2001 ] Terry Trotter, speaking as a school teacher of math, always asked the students not to use 'and' except when stating things like '3.14' [three and fourteen hundredths]. That is, to indicate the decimal point. Also for numbers between 20 and 100, like 43, 78, 55, etc. a hyphen [-] is required. forty-three, seventy-eight, etc. Realizing manners are different in different countries, for Terry, 6643 should be written as follows [English] Six thousand six hundred forty-three A000098 Prime Curios! Prime Puzzle Wikipedia 98 Le Nombre 98 Numberland 98
```

```