66482521866 has 24 divisors (see below), whose sum is σ = 149012550180. Its totient is φ = 21396673536.

The previous prime is 66482521829. The next prime is 66482521901. The reversal of 66482521866 is 66812528466.

66482521866 is a `hidden beast` number, since 66 + 482 + 5 + 21 + 86 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 63466205625 + 3016316241 = 251925^2 + 54921^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63680055 + ... + 63681098.

Almost surely, 2^66482521866 is an apocalyptic number.

66482521866 is an abundant number, since it is smaller than the sum of its proper divisors (82530028314).

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

66482521866 is a wasteful number, since it uses less digits than its factorization.

66482521866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127361190 (or 127361187 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 54.

The spelling of 66482521866 in words is "sixty-six billion, four hundred eighty-two million, five hundred twenty-one thousand, eight hundred sixty-six".