866362262263668 has 18 divisors (see below), whose sum is σ = 2189971274055474. Its totient is φ = 288787420754544.

The previous prime is 866362262263601. The next prime is 866362262263699.

866362262263668 is a `hidden beast` number, since 8 + 6 + 6 + 36 + 2 + 2 + 6 + 226 + 366 + 8 = 666.

866362262263668 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 809645367415824 + 56716894847844 = 28454268^2 + 7531062^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 866362262263596 and 866362262263605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12032809198071 + ... + 12032809198142.

Almost surely, 2^{866362262263668} is an apocalyptic number.

It is an amenable number.

866362262263668 is an abundant number, since it is smaller than the sum of its proper divisors (1323609011791806).

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

866362262263668 is a wasteful number, since it uses less digits than its factorization.

866362262263668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24065618396223 (or 24065618396218 counting only the distinct ones).

The product of its digits is 2579890176, while the sum is 72.

The spelling of 866362262263668 in words is "eight hundred sixty-six trillion, three hundred sixty-two billion, two hundred sixty-two million, two hundred sixty-three thousand, six hundred sixty-eight".