166851827875 has 16 divisors (see below), whose sum is σ = 208255320000. Its totient is φ = 133465924800.

The previous prime is 166851827867. The next prime is 166851827893. The reversal of 166851827875 is 578728158661.

It is not a de Polignac number, because 166851827875 - 2³ = 166851827867 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1067751 + ... + 1213999.

It is an arithmetic number, because the mean of its divisors is an integer number (13015957500).

Almost surely, 2^166851827875 is an apocalyptic number.

166851827875 is a deficient number, since it is larger than the sum of its proper divisors (41403492125).

166851827875 is an equidigital number, since it uses as much as digits as its factorization.

166851827875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155391 (or 155381 counting only the distinct ones).

The product of its digits is 45158400, while the sum is 64.

The spelling of 166851827875 in words is "one hundred sixty-six billion, eight hundred fifty-one million, eight hundred twenty-seven thousand, eight hundred seventy-five".