166814140201 has 2 divisors, whose sum is σ = 166814140202. Its totient is φ = 166814140200.

The previous prime is 166814140159. The next prime is 166814140217. The reversal of 166814140201 is 102041418661.

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., 163257210601 + 3556929600 = 404051^2 + 59640^2 .

It is a cyclic number.

It is not a de Polignac number, because 166814140201 - 2⁹ = 166814139689 is a prime.

It is not a weakly prime, because it can be changed into another prime (166814140271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83407070100 + 83407070101.

It is an arithmetic number, because the mean of its divisors is an integer number (83407070101).

Almost surely, 2^166814140201 is an apocalyptic number.

It is an amenable number.

166814140201 is a deficient number, since it is larger than the sum of its proper divisors (1).

166814140201 is an equidigital number, since it uses as much as digits as its factorization.

166814140201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 34.

Adding to 166814140201 its reverse (102041418661), we get a palindrome (268855558862).

The spelling of 166814140201 in words is "one hundred sixty-six billion, eight hundred fourteen million, one hundred forty thousand, two hundred one".