166486801 has 6 divisors (see below), whose sum is σ = 180278790. Its totient is φ = 153679968.

The previous prime is 166486781. The next prime is 166486813. The reversal of 166486801 is 108684661.

It can be written as a sum of positive squares in 3 ways, for example, as 20657025 + 145829776 = 4545^2 + 12076^2 .

It is not a de Polignac number, because 166486801 - 2⁵ = 166486769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166487801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 492396 + ... + 492733.

It is an arithmetic number, because the mean of its divisors is an integer number (30046465).

Almost surely, 2^166486801 is an apocalyptic number.

It is an amenable number.

166486801 is a deficient number, since it is larger than the sum of its proper divisors (13791989).

166486801 is an equidigital number, since it uses as much as digits as its factorization.

166486801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 985155 (or 985142 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 166486801 is about 12902.9764395662. The cubic root of 166486801 is about 550.1231691092.

The spelling of 166486801 in words is "one hundred sixty-six million, four hundred eighty-six thousand, eight hundred one".