166805201 has 2 divisors, whose sum is σ = 166805202. Its totient is φ = 166805200.

The previous prime is 166805167. The next prime is 166805231. The reversal of 166805201 is 102508661.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 166281025 + 524176 = 12895^2 + 724^2 .

It is a cyclic number.

It is not a de Polignac number, because 166805201 - 2⁶ = 166805137 is a prime.

It is not a weakly prime, because it can be changed into another prime (166805231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83402600 + 83402601.

It is an arithmetic number, because the mean of its divisors is an integer number (83402601).

Almost surely, 2^166805201 is an apocalyptic number.

It is an amenable number.

166805201 is a deficient number, since it is larger than the sum of its proper divisors (1).

166805201 is an equidigital number, since it uses as much as digits as its factorization.

166805201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 166805201 is about 12915.3087845394. The cubic root of 166805201 is about 550.4736426854.

The spelling of 166805201 in words is "one hundred sixty-six million, eight hundred five thousand, two hundred one".