866701808413 has 4 divisors (see below), whose sum is σ = 990516352480. Its totient is φ = 742887264348.

The previous prime is 866701808341. The next prime is 866701808477. The reversal of 866701808413 is 314808107668.

866701808413 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 866701808413 - 2⁹ = 866701807901 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 (866701808113) 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, 61907272023 + ... + 61907272036.

It is an arithmetic number, because the mean of its divisors is an integer number (247629088120).

Almost surely, 2^866701808413 is an apocalyptic number.

It is an amenable number.

866701808413 is a deficient number, since it is larger than the sum of its proper divisors (123814544067).

866701808413 is a wasteful number, since it uses less digits than its factorization.

866701808413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123814544066.

The product of its (nonzero) digits is 1548288, while the sum is 52.

The spelling of 866701808413 in words is "eight hundred sixty-six billion, seven hundred one million, eight hundred eight thousand, four hundred thirteen".