65555050668 has 12 divisors (see below), whose sum is σ = 152961784920. Its totient is φ = 21851683552.

The previous prime is 65555050663. The next prime is 65555050721. The reversal of 65555050668 is 86605055556.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 65555050668.

It is not an unprimeable number, because it can be changed into a prime (65555050663) 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 3 ways as a sum of consecutive naturals, for example, 2731460433 + ... + 2731460456.

It is an arithmetic number, because the mean of its divisors is an integer number (12746815410).

Almost surely, 2^65555050668 is an apocalyptic number.

It is an amenable number.

65555050668 is an abundant number, since it is smaller than the sum of its proper divisors (87406734252).

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

65555050668 is a wasteful number, since it uses less digits than its factorization.

65555050668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5462920896 (or 5462920894 counting only the distinct ones).

The product of its (nonzero) digits is 5400000, while the sum is 51.

The spelling of 65555050668 in words is "sixty-five billion, five hundred fifty-five million, fifty thousand, six hundred sixty-eight".