title: SyntaxError: identifier starts immediately after numeric literal – MongoDB Error
body: <p>I'm trying to run this MongoDB script:</p>
  
  <pre><code>db.test_collection.insert({ 
  _id: ObjectId(7df78ad8902c), 
  title: ‘Mongo Db practice’, 
  description: ‘this class is about MongoDB’ 
  })
  </code></pre>
  
  <p>and keep getting this error:</p>
  
  <pre><code>SyntaxError: identifier starts immediately after numeric literal @(shell):1:42
  </code></pre>
  
  <p>I think it has to do with with the _id and the ObjectId(7df78ad8902c) because when I put ObjectId("stringliteral") the error message changes.</p>
  
  <p>Any help is appreciated.</p>