866422404689 has 4 divisors (see below), whose sum is σ = 868201506624. Its totient is φ = 864643302756.

The previous prime is 866422404643. The next prime is 866422404733. The reversal of 866422404689 is 986404224668.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 866422404689 - 2⁸ = 866422404433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (866422404619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 889550237 + ... + 889551210.

It is an arithmetic number, because the mean of its divisors is an integer number (217050376656).

Almost surely, 2^866422404689 is an apocalyptic number.

It is an amenable number.

866422404689 is a deficient number, since it is larger than the sum of its proper divisors (1779101935).

866422404689 is a wasteful number, since it uses less digits than its factorization.

866422404689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1779101934.

The product of its (nonzero) digits is 31850496, while the sum is 59.

The spelling of 866422404689 in words is "eight hundred sixty-six billion, four hundred twenty-two million, four hundred four thousand, six hundred eighty-nine".