new_contents: __author__ = 'Prateek'
  from sympy import primerange
  
  def phi(n):
      value = n
      for i in primerange(1, n):
          if n % i == 0:
              value = value * (1 - i ** -1)
      return int(value)
  
  
  if __author__ == 'Prateek':
      print phi(666)
subject: Return phi value of a number