166709445875 has 16 divisors (see below), whose sum is σ = 237775302336. Its totient is φ = 114315048000.

The previous prime is 166709445869. The next prime is 166709445883. The reversal of 166709445875 is 578544907661.

It is not a de Polignac number, because 166709445875 - 2⁸ = 166709445619 is a prime.

It is a super-3 number, since 3×166709445875³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 95261666 + ... + 95263415.

It is an arithmetic number, because the mean of its divisors is an integer number (14860956396).

Almost surely, 2^166709445875 is an apocalyptic number.

166709445875 is a deficient number, since it is larger than the sum of its proper divisors (71065856461).

166709445875 is an equidigital number, since it uses as much as digits as its factorization.

166709445875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190525103 (or 190525093 counting only the distinct ones).

The product of its (nonzero) digits is 50803200, while the sum is 62.

The spelling of 166709445875 in words is "one hundred sixty-six billion, seven hundred nine million, four hundred forty-five thousand, eight hundred seventy-five".