866786383716263 has 4 divisors (see below), whose sum is σ = 866787588388128. Its totient is φ = 866785179044400.

The previous prime is 866786383716241. The next prime is 866786383716287. The reversal of 866786383716263 is 362617383687668.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 866786383716263 - 2⁴⁰ = 865686872088487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866786383716763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 601256006 + ... + 602695907.

It is an arithmetic number, because the mean of its divisors is an integer number (216696897097032).

Almost surely, 2^{866786383716263} is an apocalyptic number.

866786383716263 is a deficient number, since it is larger than the sum of its proper divisors (1204671865).

866786383716263 is a wasteful number, since it uses less digits than its factorization.

866786383716263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1204671864.

The product of its digits is 10534551552, while the sum is 80.

The spelling of 866786383716263 in words is "eight hundred sixty-six trillion, seven hundred eighty-six billion, three hundred eighty-three million, seven hundred sixteen thousand, two hundred sixty-three".