866786278583307 has 16 divisors (see below), whose sum is σ = 1217082590760320. Its totient is φ = 547200765000000.

The previous prime is 866786278583287. The next prime is 866786278583333. The reversal of 866786278583307 is 703385872687668.

It is not a de Polignac number, because 866786278583307 - 2⁶ = 866786278583243 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 866786278583307.

It is not an unprimeable number, because it can be changed into a prime (866786278584307) 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, 3377654194 + ... + 3377910807.

It is an arithmetic number, because the mean of its divisors is an integer number (76067661922520).

Almost surely, 2^{866786278583307} is an apocalyptic number.

866786278583307 is a deficient number, since it is larger than the sum of its proper divisors (350296312177013).

866786278583307 is a wasteful number, since it uses less digits than its factorization.

866786278583307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6755567274.

The product of its (nonzero) digits is 27311800320, while the sum is 84.

The spelling of 866786278583307 in words is "eight hundred sixty-six trillion, seven hundred eighty-six billion, two hundred seventy-eight million, five hundred eighty-three thousand, three hundred seven".