166650101201 has 2 divisors, whose sum is σ = 166650101202. Its totient is φ = 166650101200.

The previous prime is 166650101197. The next prime is 166650101209. The reversal of 166650101201 is 102101056661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126319822225 + 40330278976 = 355415^2 + 200824^2 .

It is a cyclic number.

It is not a de Polignac number, because 166650101201 - 2² = 166650101197 is a prime.

It is not a weakly prime, because it can be changed into another prime (166650101209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83325050600 + 83325050601.

It is an arithmetic number, because the mean of its divisors is an integer number (83325050601).

Almost surely, 2^166650101201 is an apocalyptic number.

It is an amenable number.

166650101201 is a deficient number, since it is larger than the sum of its proper divisors (1).

166650101201 is an equidigital number, since it uses as much as digits as its factorization.

166650101201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 29.

Adding to 166650101201 its reverse (102101056661), we get a palindrome (268751157862).

The spelling of 166650101201 in words is "one hundred sixty-six billion, six hundred fifty million, one hundred one thousand, two hundred one".