65585771897 has 2 divisors, whose sum is σ = 65585771898. Its totient is φ = 65585771896.

The previous prime is 65585771869. The next prime is 65585771899. The reversal of 65585771897 is 79817758556.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55233930361 + 10351841536 = 235019^2 + 101744^2 .

It is a cyclic number.

It is not a de Polignac number, because 65585771897 - 2¹⁸ = 65585509753 is a prime.

Together with 65585771899, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65585771899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32792885948 + 32792885949.

It is an arithmetic number, because the mean of its divisors is an integer number (32792885949).

Almost surely, 2^65585771897 is an apocalyptic number.

It is an amenable number.

65585771897 is a deficient number, since it is larger than the sum of its proper divisors (1).

65585771897 is an equidigital number, since it uses as much as digits as its factorization.

65585771897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 148176000, while the sum is 68.

The spelling of 65585771897 in words is "sixty-five billion, five hundred eighty-five million, seven hundred seventy-one thousand, eight hundred ninety-seven".