65888161 has 2 divisors, whose sum is σ = 65888162. Its totient is φ = 65888160.

The previous prime is 65888159. The next prime is 65888167. The reversal of 65888161 is 16188856.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65691025 + 197136 = 8105^2 + 444^2 .

It is a cyclic number.

It is not a de Polignac number, because 65888161 - 2¹ = 65888159 is a prime.

Together with 65888159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (65888167) 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 as a sum of consecutive naturals, namely, 32944080 + 32944081.

It is an arithmetic number, because the mean of its divisors is an integer number (32944081).

Almost surely, 2^65888161 is an apocalyptic number.

It is an amenable number.

65888161 is a deficient number, since it is larger than the sum of its proper divisors (1).

65888161 is an equidigital number, since it uses as much as digits as its factorization.

65888161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 92160, while the sum is 43.

The square root of 65888161 is about 8117.1522715790. The cubic root of 65888161 is about 403.8956062165.

It can be divided in two parts, 65888 and 161, that added together give a square (66049 = 257²).

The spelling of 65888161 in words is "sixty-five million, eight hundred eighty-eight thousand, one hundred sixty-one".