66848884866 has 48 divisors (see below), whose sum is σ = 149752395000. Its totient is φ = 21535179264.

The previous prime is 66848884849. The next prime is 66848884889.

It is a happy number.

66848884866 is a `hidden beast` number, since 6 + 6 + 8 + 488 + 84 + 8 + 66 = 666.

66848884866 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 39390737841 + 27458147025 = 198471^2 + 165705^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66848884794 and 66848884803.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 237591 + ... + 436058.

Almost surely, 2^66848884866 is an apocalyptic number.

66848884866 is an abundant number, since it is smaller than the sum of its proper divisors (82903510134).

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

66848884866 is a wasteful number, since it uses less digits than its factorization.

66848884866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673843 (or 673840 counting only the distinct ones).

The product of its digits is 679477248, while the sum is 72.

The spelling of 66848884866 in words is "sixty-six billion, eight hundred forty-eight million, eight hundred eighty-four thousand, eight hundred sixty-six".