65721775205227 has 16 divisors (see below), whose sum is σ = 66471663280000. Its totient is φ = 64974574393344.

The previous prime is 65721775205213. The next prime is 65721775205249. The reversal of 65721775205227 is 72250257712756.

65721775205227 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 65721775205227 - 2¹¹ = 65721775203179 is a prime.

It is a super-2 number, since 2×65721775205227² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65721775205027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1758705799 + ... + 1758743167.

It is an arithmetic number, because the mean of its divisors is an integer number (4154478955000).

Almost surely, 2^{65721775205227} is an apocalyptic number.

65721775205227 is a deficient number, since it is larger than the sum of its proper divisors (749888074773).

65721775205227 is a wasteful number, since it uses less digits than its factorization.

65721775205227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72790.

The product of its (nonzero) digits is 28812000, while the sum is 58.

The spelling of 65721775205227 in words is "sixty-five trillion, seven hundred twenty-one billion, seven hundred seventy-five million, two hundred five thousand, two hundred twenty-seven".