166613201 has 2 divisors, whose sum is σ = 166613202. Its totient is φ = 166613200.

The previous prime is 166613197. The next prime is 166613203. The reversal of 166613201 is 102316661.

166613201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140398801 + 26214400 = 11849^2 + 5120^2 .

It is a cyclic number.

It is not a de Polignac number, because 166613201 - 2² = 166613197 is a prime.

Together with 166613203, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (166613203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83306600 + 83306601.

It is an arithmetic number, because the mean of its divisors is an integer number (83306601).

Almost surely, 2^166613201 is an apocalyptic number.

It is an amenable number.

166613201 is a deficient number, since it is larger than the sum of its proper divisors (1).

166613201 is an equidigital number, since it uses as much as digits as its factorization.

166613201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 166613201 is about 12907.8736048971. The cubic root of 166613201 is about 550.2623552749.

Adding to 166613201 its reverse (102316661), we get a palindrome (268929862).

The spelling of 166613201 in words is "one hundred sixty-six million, six hundred thirteen thousand, two hundred one".