65166115613 has 2 divisors, whose sum is σ = 65166115614. Its totient is φ = 65166115612.

The previous prime is 65166115571. The next prime is 65166115711. The reversal of 65166115613 is 31651166156.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65136227524 + 29888089 = 255218^2 + 5467^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65166115613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65166115513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32583057806 + 32583057807.

It is an arithmetic number, because the mean of its divisors is an integer number (32583057807).

Almost surely, 2^65166115613 is an apocalyptic number.

It is an amenable number.

65166115613 is a deficient number, since it is larger than the sum of its proper divisors (1).

65166115613 is an equidigital number, since it uses as much as digits as its factorization.

65166115613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97200, while the sum is 41.

The spelling of 65166115613 in words is "sixty-five billion, one hundred sixty-six million, one hundred fifteen thousand, six hundred thirteen".