Find the oracle database 32bit or 64bit

[appldev@sreendba admin]$ sqlplus apps/apps

SQL*Plus: Release 10.1.0.5.0 - Production on Tue Aug 29 11:21:19 2017

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Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

SQL> select (case length(address) when 16 then '64-bit Oracle'
when 8 then '32-bit Oracle'
when 32 then '128-bit Oracle'
end) Wordsize
from v$sql
where rownum <2
/
  2    3    4    5    6    7
WORDSIZE
------------------------------------------
64-bit Oracle

SQL>