166116201 has 4 divisors (see below), whose sum is σ = 221488272. Its totient is φ = 110744132.

The previous prime is 166116193. The next prime is 166116217. The reversal of 166116201 is 102611661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 102611661 = 3 ⋅34203887.

It is a cyclic number.

It is not a de Polignac number, because 166116201 - 2³ = 166116193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166116271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27686031 + ... + 27686036.

It is an arithmetic number, because the mean of its divisors is an integer number (55372068).

Almost surely, 2^166116201 is an apocalyptic number.

It is an amenable number.

166116201 is a deficient number, since it is larger than the sum of its proper divisors (55372071).

166116201 is an equidigital number, since it uses as much as digits as its factorization.

166116201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55372070.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 166116201 is about 12888.6074111985. The cubic root of 166116201 is about 549.7146740443.

Adding to 166116201 its reverse (102611661), we get a palindrome (268727862).

The spelling of 166116201 in words is "one hundred sixty-six million, one hundred sixteen thousand, two hundred one".