166543875 has 48 divisors (see below), whose sum is σ = 301815072. Its totient is φ = 88353600.

The previous prime is 166543801. The next prime is 166543877. The reversal of 166543875 is 578345661.

It is not a de Polignac number, because 166543875 - 2²⁰ = 165495299 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 166543875.

It is not an unprimeable number, because it can be changed into a prime (166543877) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 356392 + ... + 356858.

It is an arithmetic number, because the mean of its divisors is an integer number (6287814).

Almost surely, 2^166543875 is an apocalyptic number.

166543875 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

166543875 is a deficient number, since it is larger than the sum of its proper divisors (135271197).

166543875 is a wasteful number, since it uses less digits than its factorization.

166543875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805 (or 792 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The square root of 166543875 is about 12905.1879102941. The cubic root of 166543875 is about 550.1860252283.

The spelling of 166543875 in words is "one hundred sixty-six million, five hundred forty-three thousand, eight hundred seventy-five".