66085975128 has 16 divisors (see below), whose sum is σ = 165214937880. Its totient is φ = 22028658368.

The previous prime is 66085975121. The next prime is 66085975133. The reversal of 66085975128 is 82157958066.

It is a super-2 number, since 2×66085975128² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66085975121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1376791125 + ... + 1376791172.

Almost surely, 2^66085975128 is an apocalyptic number.

It is an amenable number.

66085975128 is an abundant number, since it is smaller than the sum of its proper divisors (99128962752).

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

66085975128 is a wasteful number, since it uses less digits than its factorization.

66085975128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2753582306 (or 2753582302 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 57.

The spelling of 66085975128 in words is "sixty-six billion, eighty-five million, nine hundred seventy-five thousand, one hundred twenty-eight".