from itertools import islice
from functools import reduce
from operator import mul


def window(seq, n=2):
    "from https://stackoverflow.com/a/6822773"
    "Returns a sliding window (of width n) over data from the iterable"
    "   s -> (s0,s1,...s[n-1]), (s1,s2,...,sn), ...                   "
    it = iter(seq)
    result = tuple(islice(it, n))
    if len(result) == n:
        yield result
    for elem in it:
        result = result[1:] + (elem,)
        yield result

def f(number: int, consecutive_count: int = 4):
    number_str = (int(i) for i in str(number))

    result = max(
        reduce(mul, slide) for slide in window(number_str, 4)
    )

    return result


assert f(1234567) == 4*5*6*7
assert f(11987611118765) == 9*8*7*6