665113201 has 2 divisors, whose sum is σ = 665113202. Its totient is φ = 665113200.

The previous prime is 665113157. The next prime is 665113213. The reversal of 665113201 is 102311566.

665113201 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., 434680801 + 230432400 = 20849^2 + 15180^2 .

It is a cyclic number.

It is not a de Polignac number, because 665113201 - 2¹⁵ = 665080433 is a prime.

It is not a weakly prime, because it can be changed into another prime (665113261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332556600 + 332556601.

It is an arithmetic number, because the mean of its divisors is an integer number (332556601).

Almost surely, 2^665113201 is an apocalyptic number.

It is an amenable number.

665113201 is a deficient number, since it is larger than the sum of its proper divisors (1).

665113201 is an equidigital number, since it uses as much as digits as its factorization.

665113201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 665113201 is about 25789.7886963038. The cubic root of 665113201 is about 872.9013983802.

Adding to 665113201 its reverse (102311566), we get a palindrome (767424767).

The spelling of 665113201 in words is "six hundred sixty-five million, one hundred thirteen thousand, two hundred one".