I've had two WordPress blogs hacked into previously. That was in a time when I was doing virtually no online advertising, and until I found time to deal with the situation (weeks later), these sites were penalized in the main search engines. They weren't eliminated, however the evaluations were reduced.
The rename your login url to secure your wordpress website Codex has an outline of what permissions are okay. Directory and file permissions can be changed through an FTP client or within the administrative page from your hosting company.
Use strong passwords - Do what you can to use a strong password, alpha-numeric, with upper and lower case and special characters. Easy to remember passwords are also easy to guess!
First in line is currently creating a smarter password to your account. Passwords must be made with special characters and numbers. You may combine them and create plus altered letters. Smarter you can try here passwords can be your gateway to zero hackers. Make passwords that are difficult that you can consider.
Now we're getting into things. Whenever you Website install WordPress, you have to edit the document config-sample.php and rename it to config.php. You need to install the database details there.
Do not use wp_. That default is being eliminated by most web hosting providers but if yours doesn't, fix wp_ to anything but that.