65161633 has 2 divisors, whose sum is σ = 65161634. Its totient is φ = 65161632.

The previous prime is 65161619. The next prime is 65161643. The reversal of 65161633 is 33616156.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47997184 + 17164449 = 6928^2 + 4143^2 .

It is a cyclic number.

It is not a de Polignac number, because 65161633 - 2⁹ = 65161121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 65161595 and 65161604.

It is not a weakly prime, because it can be changed into another prime (65161643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32580816 + 32580817.

It is an arithmetic number, because the mean of its divisors is an integer number (32580817).

Almost surely, 2^65161633 is an apocalyptic number.

It is an amenable number.

65161633 is a deficient number, since it is larger than the sum of its proper divisors (1).

65161633 is an equidigital number, since it uses as much as digits as its factorization.

65161633 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9720, while the sum is 31.

The square root of 65161633 is about 8072.2755775556. The cubic root of 65161633 is about 402.4055727977.

Adding to 65161633 its reverse (33616156), we get a palindrome (98777789).

The spelling of 65161633 in words is "sixty-five million, one hundred sixty-one thousand, six hundred thirty-three".