65556065550 has 48 divisors (see below), whose sum is σ = 172142522352. Its totient is φ = 16453286400.

The previous prime is 65556065527. The next prime is 65556065551. The reversal of 65556065550 is 5556065556.

65556065550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 65556065550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65556065551) 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, 12851581 + ... + 12856680.

It is an arithmetic number, because the mean of its divisors is an integer number (3586302549).

Almost surely, 2^65556065550 is an apocalyptic number.

65556065550 is an abundant number, since it is smaller than the sum of its proper divisors (106586456802).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65556065550 is a wasteful number, since it uses less digits than its factorization.

65556065550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25708293 (or 25708288 counting only the distinct ones).

The product of its (nonzero) digits is 3375000, while the sum is 48.

The spelling of 65556065550 in words is "sixty-five billion, five hundred fifty-six million, sixty-five thousand, five hundred fifty".