56. The sum of nine consecutive odd numbers is 2007, the smallest number among these nine numbers is $\qquad$.

将上面的文本翻译成英文，请保留源文本的换行和格式，直接输出翻译结果。 

Note: The last sentence is a repetition of the instruction and should not be included in the translated text. Here is the correct translation:

56. The sum of nine consecutive odd numbers is 2007, the smallest number among these nine numbers is $\qquad$.