I'm uncertain what you refer to as a compound number.

If you mean the multi-digit number before a date number is reduced, summing the month number, the day number and the year number, then the result is 1977. (1977 reduces to 6.)

On the other hand, if you add the individual digits together (instead of the whole numbers) the result is 33. (33 reduces to 6.)

Further, if you reduce each of the month, day, and year numbers to single digits, then add those 3 digits, the result is 6.

For others who may be reading this response, I'll use a fictitious date for calculation examples: November 10, 1965

10 + 10 + 1965 = 1985
1+0+1+0+1+9+6+5 = 23
1 + 1 + 3 = 5 

Your question didn't reveal why you needed the compound number.

The number 33 is sometimes considered to be a master number, but not in this case. The birth date you provided calculates to a life path number 6.

To find a life path number, reduce each of the three date items (month, day, year) to either a single digit or a master number. Then add those three together. Always do it that way because if a life path master number is found in any other way then it is not a valid master number.

The life path calculator may be used.