66856328484 has 48 divisors (see below), whose sum is σ = 170247624960. Its totient is φ = 20251412640.

The previous prime is 66856328419. The next prime is 66856328503. The reversal of 66856328484 is 48482365866.

66856328484 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (60) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 235407 + ... + 434889.

It is an arithmetic number, because the mean of its divisors is an integer number (3546825520).

Almost surely, 2^66856328484 is an apocalyptic number.

It is an amenable number.

66856328484 is an abundant number, since it is smaller than the sum of its proper divisors (103391296476).

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

66856328484 is a wasteful number, since it uses less digits than its factorization.

66856328484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202040 (or 202038 counting only the distinct ones).

The product of its digits is 53084160, while the sum is 60.

The spelling of 66856328484 in words is "sixty-six billion, eight hundred fifty-six million, three hundred twenty-eight thousand, four hundred eighty-four".