66008751885 has 24 divisors (see below), whose sum is σ = 114516600120. Its totient is φ = 35173458432.

The previous prime is 66008751857. The next prime is 66008751947. The reversal of 66008751885 is 58815780066.

It can be written as a sum of positive squares in 4 ways, for example, as 11520587556 + 54488164329 = 107334^2 + 233427^2 .

It is not a de Polignac number, because 66008751885 - 2¹⁰ = 66008750861 is a prime.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 598824 + ... + 700433.

It is an arithmetic number, because the mean of its divisors is an integer number (4771525005).

Almost surely, 2^66008751885 is an apocalyptic number.

It is an amenable number.

66008751885 is a deficient number, since it is larger than the sum of its proper divisors (48507848235).

66008751885 is a wasteful number, since it uses less digits than its factorization.

66008751885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1300397 (or 1300394 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 54.

The spelling of 66008751885 in words is "sixty-six billion, eight million, seven hundred fifty-one thousand, eight hundred eighty-five".