866507855138763 has 16 divisors (see below), whose sum is σ = 1163723328688896. Its totient is φ = 573486933549600.

The previous prime is 866507855138711. The next prime is 866507855138771. The reversal of 866507855138763 is 367831558705668.

866507855138763 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 866507855138763 - 2⁹ = 866507855138251 is a prime.

It is not an unprimeable number, because it can be changed into a prime (866507855134763) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 598155981 + ... + 599602862.

It is an arithmetic number, because the mean of its divisors is an integer number (72732708043056).

Almost surely, 2^{866507855138763} is an apocalyptic number.

866507855138763 is a deficient number, since it is larger than the sum of its proper divisors (297215473550133).

866507855138763 is a wasteful number, since it uses less digits than its factorization.

866507855138763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1197760594.

The product of its (nonzero) digits is 6096384000, while the sum is 78.

The spelling of 866507855138763 in words is "eight hundred sixty-six trillion, five hundred seven billion, eight hundred fifty-five million, one hundred thirty-eight thousand, seven hundred sixty-three".