866444206078757 has 8 divisors (see below), whose sum is σ = 870520930406400. Its totient is φ = 862369190004240.

The previous prime is 866444206078741. The next prime is 866444206078849. The reversal of 866444206078757 is 757870602444668.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 866444206078757 - 2⁴ = 866444206078741 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 (866444206074757) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 426046469 + ... + 428075322.

It is an arithmetic number, because the mean of its divisors is an integer number (108815116300800).

Almost surely, 2^{866444206078757} is an apocalyptic number.

It is an amenable number.

866444206078757 is a deficient number, since it is larger than the sum of its proper divisors (4076724327643).

866444206078757 is a wasteful number, since it uses less digits than its factorization.

866444206078757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854126563.

The product of its (nonzero) digits is 3034644480, while the sum is 74.

The spelling of 866444206078757 in words is "eight hundred sixty-six trillion, four hundred forty-four billion, two hundred six million, seventy-eight thousand, seven hundred fifty-seven".