866761260055747 has 8 divisors (see below), whose sum is σ = 1003123338944000. Its totient is φ = 733533941601864.

The previous prime is 866761260055709. The next prime is 866761260055777. The reversal of 866761260055747 is 747550062167668.

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 866761260055747 - 2²³ = 866761251667139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (866761260055777) 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, 783690107997 + ... + 783690109102.

It is an arithmetic number, because the mean of its divisors is an integer number (125390417368000).

Almost surely, 2^{866761260055747} is an apocalyptic number.

866761260055747 is a deficient number, since it is larger than the sum of its proper divisors (136362078888253).

866761260055747 is a wasteful number, since it uses less digits than its factorization.

866761260055747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1567380217185.

The product of its (nonzero) digits is 711244800, while the sum is 70.

The spelling of 866761260055747 in words is "eight hundred sixty-six trillion, seven hundred sixty-one billion, two hundred sixty million, fifty-five thousand, seven hundred forty-seven".