65005660061 has 2 divisors, whose sum is σ = 65005660062. Its totient is φ = 65005660060.

The previous prime is 65005660043. The next prime is 65005660073. The reversal of 65005660061 is 16006650056.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38263272100 + 26742387961 = 195610^2 + 163531^2 .

It is a cyclic number.

It is not a de Polignac number, because 65005660061 - 2¹⁸ = 65005397917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65005662061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32502830030 + 32502830031.

It is an arithmetic number, because the mean of its divisors is an integer number (32502830031).

Almost surely, 2^65005660061 is an apocalyptic number.

It is an amenable number.

65005660061 is a deficient number, since it is larger than the sum of its proper divisors (1).

65005660061 is an equidigital number, since it uses as much as digits as its factorization.

65005660061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 35.

The spelling of 65005660061 in words is "sixty-five billion, five million, six hundred sixty thousand, sixty-one".