66010550565 has 16 divisors (see below), whose sum is σ = 105633233856. Its totient is φ = 35200176000.

The previous prime is 66010550527. The next prime is 66010550591. The reversal of 66010550565 is 56505501066.

It is not a de Polignac number, because 66010550565 - 2¹¹ = 66010548517 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 239611 + ... + 435240.

It is an arithmetic number, because the mean of its divisors is an integer number (6602077116).

Almost surely, 2^66010550565 is an apocalyptic number.

It is an amenable number.

66010550565 is a deficient number, since it is larger than the sum of its proper divisors (39622683291).

66010550565 is a wasteful number, since it uses less digits than its factorization.

66010550565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681380.

The product of its (nonzero) digits is 135000, while the sum is 39.

The spelling of 66010550565 in words is "sixty-six billion, ten million, five hundred fifty thousand, five hundred sixty-five".