66506048028 has 96 divisors (see below), whose sum is σ = 203411640320. Its totient is φ = 18388762560.

The previous prime is 66506047991. The next prime is 66506048033. The reversal of 66506048028 is 82084060566.

66506048028 is a `hidden beast` number, since 66 + 50 + 60 + 480 + 2 + 8 = 666.

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 31 ways as a sum of consecutive naturals, for example, 1395451 + ... + 1442322.

Almost surely, 2^66506048028 is an apocalyptic number.

It is an amenable number.

66506048028 is an abundant number, since it is smaller than the sum of its proper divisors (136905592292).

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

66506048028 is a wasteful number, since it uses less digits than its factorization.

66506048028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2837824 (or 2837816 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The spelling of 66506048028 in words is "sixty-six billion, five hundred six million, forty-eight thousand, twenty-eight".