866585868585668 has 48 divisors (see below), whose sum is σ = 1890741982647168. Its totient is φ = 337629218880000.

The previous prime is 866585868585667. The next prime is 866585868585683.

866585868585668 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (866585868585667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57709298 + ... + 71158518.

It is an arithmetic number, because the mean of its divisors is an integer number (39390457971816).

Almost surely, 2^{866585868585668} is an apocalyptic number.

It is an amenable number.

866585868585668 is an abundant number, since it is smaller than the sum of its proper divisors (1024156114061500).

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

866585868585668 is a wasteful number, since it uses less digits than its factorization.

866585868585668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13658444 (or 13658442 counting only the distinct ones).

The product of its digits is 1274019840000, while the sum is 98.

The spelling of 866585868585668 in words is "eight hundred sixty-six trillion, five hundred eighty-five billion, eight hundred sixty-eight million, five hundred eighty-five thousand, six hundred sixty-eight".