65506771485 has 24 divisors (see below), whose sum is σ = 119521128480. Its totient is φ = 33098157792.

The previous prime is 65506771459. The next prime is 65506771487. The reversal of 65506771485 is 58417760556.

It is a happy number.

65506771485 is a `hidden beast` number, since 6 + 550 + 6 + 7 + 7 + 1 + 4 + 85 = 666.

It is not a de Polignac number, because 65506771485 - 2²² = 65502577181 is a prime.

It is a super-2 number, since 2×65506771485² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65506771487) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38307199 + ... + 38308908.

It is an arithmetic number, because the mean of its divisors is an integer number (4980047020).

Almost surely, 2^65506771485 is an apocalyptic number.

It is an amenable number.

65506771485 is a deficient number, since it is larger than the sum of its proper divisors (54014356995).

65506771485 is a wasteful number, since it uses less digits than its factorization.

65506771485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76616137 (or 76616134 counting only the distinct ones).

The product of its (nonzero) digits is 7056000, while the sum is 54.

The spelling of 65506771485 in words is "sixty-five billion, five hundred six million, seven hundred seventy-one thousand, four hundred eighty-five".