866786278583480 has 64 divisors (see below), whose sum is σ = 2022074008293600. Its totient is φ = 334003175134720.

The previous prime is 866786278583441. The next prime is 866786278583527. The reversal of 866786278583480 is 84385872687668.

It is a junction number, because it is equal to n+sod(n) for n = 866786278583392 and 866786278583401.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 842860331 + ... + 843888090.

Almost surely, 2^{866786278583480} is an apocalyptic number.

It is an amenable number.

866786278583480 is an abundant number, since it is smaller than the sum of its proper divisors (1155287729710120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

866786278583480 is a wasteful number, since it uses less digits than its factorization.

866786278583480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1686748904 (or 1686748900 counting only the distinct ones).

The product of its (nonzero) digits is 41617981440, while the sum is 86.

The spelling of 866786278583480 in words is "eight hundred sixty-six trillion, seven hundred eighty-six billion, two hundred seventy-eight million, five hundred eighty-three thousand, four hundred eighty".