166804061 has 2 divisors, whose sum is σ = 166804062. Its totient is φ = 166804060.

The previous prime is 166804049. The next prime is 166804133. The reversal of 166804061 is 160408661.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 157000900 + 9803161 = 12530^2 + 3131^2 .

It is a cyclic number.

It is not a de Polignac number, because 166804061 - 2¹⁰ = 166803037 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166804661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83402030 + 83402031.

It is an arithmetic number, because the mean of its divisors is an integer number (83402031).

Almost surely, 2^166804061 is an apocalyptic number.

It is an amenable number.

166804061 is a deficient number, since it is larger than the sum of its proper divisors (1).

166804061 is an equidigital number, since it uses as much as digits as its factorization.

166804061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 166804061 is about 12915.2646507921. The cubic root of 166804061 is about 550.4723886451.

The spelling of 166804061 in words is "one hundred sixty-six million, eight hundred four thousand, sixty-one".