65500566771 has 8 divisors (see below), whose sum is σ = 87335435520. Its totient is φ = 43666371272.

The previous prime is 65500566751. The next prime is 65500566773. The reversal of 65500566771 is 17766500556.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65500566771 - 2⁶ = 65500566707 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65500566771.

It is not an unprimeable number, because it can be changed into a prime (65500566773) 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 7 ways as a sum of consecutive naturals, for example, 138706 + ... + 387608.

It is an arithmetic number, because the mean of its divisors is an integer number (10916929440).

Almost surely, 2^65500566771 is an apocalyptic number.

65500566771 is a deficient number, since it is larger than the sum of its proper divisors (21834868749).

65500566771 is a wasteful number, since it uses less digits than its factorization.

65500566771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336625.

The product of its (nonzero) digits is 1323000, while the sum is 48.

The spelling of 65500566771 in words is "sixty-five billion, five hundred million, five hundred sixty-six thousand, seven hundred seventy-one".