866786026508480 has 224 divisors, whose sum is σ = 2242826302248000. Its totient is φ = 317162403790848.

The previous prime is 866786026508477. The next prime is 866786026508539. The reversal of 866786026508480 is 84805620687668.

It is a junction number, because it is equal to n+sod(n) for n = 866786026508398 and 866786026508407.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3087815171 + ... + 3088095869.

It is an arithmetic number, because the mean of its divisors is an integer number (10012617420750).

Almost surely, 2^{866786026508480} is an apocalyptic number.

866786026508480 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 866786026508480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1121413151124000).

866786026508480 is an abundant number, since it is smaller than the sum of its proper divisors (1376040275739520).

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

866786026508480 is a wasteful number, since it uses less digits than its factorization.

866786026508480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287411 (or 287401 counting only the distinct ones).

The product of its (nonzero) digits is 1486356480, while the sum is 74.

The spelling of 866786026508480 in words is "eight hundred sixty-six trillion, seven hundred eighty-six billion, twenty-six million, five hundred eight thousand, four hundred eighty".