866547745668 has 72 divisors (see below), whose sum is σ = 2530134079200. Its totient is φ = 247143740160.

The previous prime is 866547745607. The next prime is 866547745669.

866547745668 is a `hidden beast` number, since 8 + 6 + 6 + 54 + 7 + 7 + 4 + 566 + 8 = 666.

866547745668 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 866547745596 and 866547745605.

It is not an unprimeable number, because it can be changed into a prime (866547745669) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64353618 + ... + 64367081.

It is an arithmetic number, because the mean of its divisors is an integer number (35140751100).

Almost surely, 2^866547745668 is an apocalyptic number.

It is an amenable number.

866547745668 is an abundant number, since it is smaller than the sum of its proper divisors (1663586333532).

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

866547745668 is a wasteful number, since it uses less digits than its factorization.

866547745668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128720737 (or 128720732 counting only the distinct ones).

The product of its digits is 1625702400, while the sum is 72.

The spelling of 866547745668 in words is "eight hundred sixty-six billion, five hundred forty-seven million, seven hundred forty-five thousand, six hundred sixty-eight".