Looks like a social security number in that filing
Harold Engel 066-40-7703
SOCIAL SECURITY NUMBER PREFIXES
These prefixes indicate the state in which the Social Security Number was issued. This will assist you in identifying the state in which the individual lived or was possibly born. This is a big help when you’re searching the Internet. The prefixes are the first three digits of the SSN. When searching the Internet I use www.switchboard.com.
According to our records, the prefix 066 is a valid prefix from the state/territory of New York. Social security numbers have been issued with the middle two digits 40. So, this number is likely valid.
The highest group number (the middle two digits) that has been issued for 066 is 98. Keep in mind that the social security system uses an unusual out-of-order numbering scheme:
ODD - 01, 03, 05, 07, 09------EVEN - 10 to 98 EVEN - 02, 04, 06, 08------ODD - 11 to 99
This is all the information we have for this particular number, but here are several ways to obtain more details about this number:
Look up whether a social security number belongs to a dead person (and if so, whose it is) Verify social security numbers online, courtesy of the U.S. government.