866807830377745 has 8 divisors (see below), whose sum is σ = 1040180264615016. Its totient is φ = 693439018861056.

The previous prime is 866807830377739. The next prime is 866807830377767. The reversal of 866807830377745 is 547773038708668.

It can be written as a sum of positive squares in 4 ways, for example, as 133673577469441 + 733134252908304 = 11561729^2 + 27076452^2 .

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 866807830377745 - 2²⁵ = 866807796823313 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 905153722 + ... + 906110851.

It is an arithmetic number, because the mean of its divisors is an integer number (130022533076877).

Almost surely, 2^{866807830377745} is an apocalyptic number.

It is an amenable number.

866807830377745 is a deficient number, since it is larger than the sum of its proper divisors (173372434237271).

866807830377745 is a wasteful number, since it uses less digits than its factorization.

866807830377745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1811360291.

The product of its (nonzero) digits is 7965941760, while the sum is 79.

The spelling of 866807830377745 in words is "eight hundred sixty-six trillion, eight hundred seven billion, eight hundred thirty million, three hundred seventy-seven thousand, seven hundred forty-five".