66583217866875 has 80 divisors (see below), whose sum is σ = 111395750349312. Its totient is φ = 35364259360000.

The previous prime is 66583217866859. The next prime is 66583217866931. The reversal of 66583217866875 is 57866871238566.

66583217866875 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66583217866875 - 2⁴ = 66583217866859 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66583217866875.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 639636082 + ... + 639740168.

Almost surely, 2^{66583217866875} is an apocalyptic number.

66583217866875 is a deficient number, since it is larger than the sum of its proper divisors (44812532482437).

66583217866875 is a wasteful number, since it uses less digits than its factorization.

66583217866875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105518 (or 105503 counting only the distinct ones).

The product of its digits is 4877107200, while the sum is 78.

The spelling of 66583217866875 in words is "sixty-six trillion, five hundred eighty-three billion, two hundred seventeen million, eight hundred sixty-six thousand, eight hundred seventy-five".