866422523 has 4 divisors (see below), whose sum is σ = 886571928. Its totient is φ = 846273120.

The previous prime is 866422519. The next prime is 866422597. The reversal of 866422523 is 325224668.

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 866422523 - 2² = 866422519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (866425523) 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, 10074638 + ... + 10074723.

It is an arithmetic number, because the mean of its divisors is an integer number (221642982).

Almost surely, 2^866422523 is an apocalyptic number.

866422523 is a deficient number, since it is larger than the sum of its proper divisors (20149405).

866422523 is a wasteful number, since it uses less digits than its factorization.

866422523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20149404.

The product of its digits is 138240, while the sum is 38.

The square root of 866422523 is about 29435.0560216895. The cubic root of 866422523 is about 953.3299661505.

The spelling of 866422523 in words is "eight hundred sixty-six million, four hundred twenty-two thousand, five hundred twenty-three".