How to check oracle database is either 32 bit or 64 bit

There are a lot of method for find this information about oracle database is 32 bit or 64 bit, here is one of them, also here is method to find os version from database:

Here is video of these procedures - How to check oracle database is either 32 bit or 64 bit

[oracle@oel6 ~]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.3.0 Production on Fri Feb 8 12:31:24 2013

Copyright (c) 1982, 2011, Oracle.  All rights reserved.


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

SQL> select length(addr)*4 || '-bits' Bits from v$process where rownum=1;

BITS
---------------------------------------------
64-bits

for operating system information (OS) version:

SQL> select dbms_utility.port_string from dual;
PORT_STRING
--------------------------
x86_64/Linux 2.4.xx