65168161 has 2 divisors, whose sum is σ = 65168162. Its totient is φ = 65168160.

The previous prime is 65168149. The next prime is 65168171. The reversal of 65168161 is 16186156.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57153600 + 8014561 = 7560^2 + 2831^2 .

It is a cyclic number.

It is not a de Polignac number, because 65168161 - 2²¹ = 63071009 is a prime.

It is not a weakly prime, because it can be changed into another prime (65168141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32584080 + 32584081.

It is an arithmetic number, because the mean of its divisors is an integer number (32584081).

Almost surely, 2^65168161 is an apocalyptic number.

It is an amenable number.

65168161 is a deficient number, since it is larger than the sum of its proper divisors (1).

65168161 is an equidigital number, since it uses as much as digits as its factorization.

65168161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 34.

The square root of 65168161 is about 8072.6799143779. The cubic root of 65168161 is about 402.4190102339.

The spelling of 65168161 in words is "sixty-five million, one hundred sixty-eight thousand, one hundred sixty-one".