866612443 has 4 divisors (see below), whose sum is σ = 867207880. Its totient is φ = 866017008.

The previous prime is 866612441. The next prime is 866612447. The reversal of 866612443 is 344216668.

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 866612443 - 2¹ = 866612441 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 866612396 and 866612405.

It is not an unprimeable number, because it can be changed into a prime (866612441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 295530 + ... + 298447.

It is an arithmetic number, because the mean of its divisors is an integer number (216801970).

Almost surely, 2^866612443 is an apocalyptic number.

866612443 is a deficient number, since it is larger than the sum of its proper divisors (595437).

866612443 is a wasteful number, since it uses less digits than its factorization.

866612443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595436.

The product of its digits is 165888, while the sum is 40.

The square root of 866612443 is about 29438.2819301671. The cubic root of 866612443 is about 953.3996177715.

The spelling of 866612443 in words is "eight hundred sixty-six million, six hundred twelve thousand, four hundred forty-three".