866368082433840 has 480 divisors, whose sum is σ = 3135800614915584. Its totient is φ = 197294132367360.

The previous prime is 866368082433839. The next prime is 866368082433853. The reversal of 866368082433840 is 48334280863668.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 8292852805 + ... + 8292957275.

Almost surely, 2^{866368082433840} is an apocalyptic number.

866368082433840 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 866368082433840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1567900307457792).

866368082433840 is an abundant number, since it is smaller than the sum of its proper divisors (2269432532481744).

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

866368082433840 is a wasteful number, since it uses less digits than its factorization.

866368082433840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107105 (or 107092 counting only the distinct ones).

The product of its (nonzero) digits is 764411904, while the sum is 69.

The spelling of 866368082433840 in words is "eight hundred sixty-six trillion, three hundred sixty-eight billion, eighty-two million, four hundred thirty-three thousand, eight hundred forty".