855566713 has 4 divisors (see below), whose sum is σ = 900596560. Its totient is φ = 810536868.

The previous prime is 855566711. The next prime is 855566741. The reversal of 855566713 is 317665558.

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 855566713 - 2¹ = 855566711 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (855566711) 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, 22514895 + ... + 22514932.

It is an arithmetic number, because the mean of its divisors is an integer number (225149140).

Almost surely, 2^855566713 is an apocalyptic number.

It is an amenable number.

855566713 is a deficient number, since it is larger than the sum of its proper divisors (45029847).

855566713 is a wasteful number, since it uses less digits than its factorization.

855566713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45029846.

The product of its digits is 756000, while the sum is 46.

The square root of 855566713 is about 29250.0720170054. The cubic root of 855566713 is about 949.3316492056.

The spelling of 855566713 in words is "eight hundred fifty-five million, five hundred sixty-six thousand, seven hundred thirteen".