166430805875 has 8 divisors (see below), whose sum is σ = 207705645888. Its totient is φ = 133144644600.

The previous prime is 166430805823. The next prime is 166430805917. The reversal of 166430805875 is 578508034661.

It is not a de Polignac number, because 166430805875 - 2⁶ = 166430805811 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 665723099 + ... + 665723348.

It is an arithmetic number, because the mean of its divisors is an integer number (25963205736).

Almost surely, 2^166430805875 is an apocalyptic number.

166430805875 is a deficient number, since it is larger than the sum of its proper divisors (41274840013).

166430805875 is an equidigital number, since it uses as much as digits as its factorization.

166430805875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1331446462 (or 1331446452 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 53.

The spelling of 166430805875 in words is "one hundred sixty-six billion, four hundred thirty million, eight hundred five thousand, eight hundred seventy-five".