65557007271 has 24 divisors (see below), whose sum is σ = 108533003904. Its totient is φ = 37353177360.

The previous prime is 65557007267. The next prime is 65557007273. The reversal of 65557007271 is 17270075556.

It is a happy number.

65557007271 is a `hidden beast` number, since 6 + 5 + 5 + 570 + 0 + 7 + 2 + 71 = 666.

It is not a de Polignac number, because 65557007271 - 2² = 65557007267 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65557007273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1477545 + ... + 1521266.

It is an arithmetic number, because the mean of its divisors is an integer number (4522208496).

Almost surely, 2^65557007271 is an apocalyptic number.

65557007271 is a deficient number, since it is larger than the sum of its proper divisors (42975996633).

65557007271 is a wasteful number, since it uses less digits than its factorization.

65557007271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2999171 (or 2999168 counting only the distinct ones).

The product of its (nonzero) digits is 514500, while the sum is 45.

The spelling of 65557007271 in words is "sixty-five billion, five hundred fifty-seven million, seven thousand, two hundred seventy-one".