166441387 has 48 divisors (see below), whose sum is σ = 215961600. Its totient is φ = 127370880.

The previous prime is 166441357. The next prime is 166441393. The reversal of 166441387 is 783144661.

It is not a de Polignac number, because 166441387 - 2⁷ = 166441259 is a prime.

Its product of digits (96768) is a multiple of the sum of its prime factors (216).

It is not an unprimeable number, because it can be changed into a prime (166441307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2106814 + ... + 2106892.

It is an arithmetic number, because the mean of its divisors is an integer number (4499200).

Almost surely, 2^166441387 is an apocalyptic number.

166441387 is a deficient number, since it is larger than the sum of its proper divisors (49520213).

166441387 is a wasteful number, since it uses less digits than its factorization.

166441387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216 (or 209 counting only the distinct ones).

The product of its digits is 96768, while the sum is 40.

The square root of 166441387 is about 12901.2164930289. The cubic root of 166441387 is about 550.0731439912.

The spelling of 166441387 in words is "one hundred sixty-six million, four hundred forty-one thousand, three hundred eighty-seven".