66500505055 has 32 divisors (see below), whose sum is σ = 85715159040. Its totient is φ = 49350013440.

The previous prime is 66500505031. The next prime is 66500505119. The reversal of 66500505055 is 55050500566.

It is not a de Polignac number, because 66500505055 - 2⁵ = 66500505023 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3933270 + ... + 3950140.

It is an arithmetic number, because the mean of its divisors is an integer number (2678598720).

Almost surely, 2^66500505055 is an apocalyptic number.

66500505055 is a deficient number, since it is larger than the sum of its proper divisors (19214653985).

66500505055 is a wasteful number, since it uses less digits than its factorization.

66500505055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17559.

The product of its (nonzero) digits is 112500, while the sum is 37.

The spelling of 66500505055 in words is "sixty-six billion, five hundred million, five hundred five thousand, fifty-five".