166000801 has 4 divisors (see below), whose sum is σ = 175765572. Its totient is φ = 156236032.

The previous prime is 166000799. The next prime is 166000817. The reversal of 166000801 is 108000661.

166000801 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 148352400 + 17648401 = 12180^2 + 4201^2 .

It is a cyclic number.

It is not a de Polignac number, because 166000801 - 2¹ = 166000799 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166000301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4882360 + ... + 4882393.

It is an arithmetic number, because the mean of its divisors is an integer number (43941393).

Almost surely, 2^166000801 is an apocalyptic number.

It is an amenable number.

166000801 is a deficient number, since it is larger than the sum of its proper divisors (9764771).

166000801 is an equidigital number, since it uses as much as digits as its factorization.

166000801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9764770.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 166000801 is about 12884.1298115162. The cubic root of 166000801 is about 549.5873499815.

The spelling of 166000801 in words is "one hundred sixty-six million, eight hundred one", and thus it is an aban number.