866840324832 has 192 divisors, whose sum is σ = 2572020380160. Its totient is φ = 283968571392.

The previous prime is 866840324809. The next prime is 866840324839. The reversal of 866840324832 is 238423048668.

866840324832 is a `hidden beast` number, since 86 + 6 + 84 + 0 + 3 + 2 + 483 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866840324839) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25048213 + ... + 25082795.

It is an arithmetic number, because the mean of its divisors is an integer number (13395939480).

Almost surely, 2^866840324832 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 866840324832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1286010190080).

866840324832 is an abundant number, since it is smaller than the sum of its proper divisors (1705180055328).

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

866840324832 is a wasteful number, since it uses less digits than its factorization.

866840324832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35102 (or 35088 counting only the distinct ones).

The product of its (nonzero) digits is 10616832, while the sum is 54.

The spelling of 866840324832 in words is "eight hundred sixty-six billion, eight hundred forty million, three hundred twenty-four thousand, eight hundred thirty-two".