166804201 has 8 divisors (see below), whose sum is σ = 173061000. Its totient is φ = 160581120.

The previous prime is 166804189. The next prime is 166804217. The reversal of 166804201 is 102408661.

It can be written as a sum of positive squares in 4 ways, for example, as 35105625 + 131698576 = 5925^2 + 11476^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 166804201 - 2¹⁵ = 166771433 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166804201.

It is not an unprimeable number, because it can be changed into a prime (166804241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1881 + ... + 18361.

It is an arithmetic number, because the mean of its divisors is an integer number (21632625).

Almost surely, 2^166804201 is an apocalyptic number.

It is an amenable number.

166804201 is a deficient number, since it is larger than the sum of its proper divisors (6256799).

166804201 is a wasteful number, since it uses less digits than its factorization.

166804201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16859.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 166804201 is about 12915.2700707341. The cubic root of 166804201 is about 550.4725426503.

The spelling of 166804201 in words is "one hundred sixty-six million, eight hundred four thousand, two hundred one".