866808429240 has 192 divisors, whose sum is σ = 2821029033600. Its totient is φ = 212975433216.

The previous prime is 866808429197. The next prime is 866808429241. The reversal of 866808429240 is 42924808668.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866808429241) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 11054091 + ... + 11132229.

It is an arithmetic number, because the mean of its divisors is an integer number (14692859550).

Almost surely, 2^866808429240 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 866808429240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1410514516800).

866808429240 is an abundant number, since it is smaller than the sum of its proper divisors (1954220604360).

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

866808429240 is a wasteful number, since it uses less digits than its factorization.

866808429240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78726 (or 78709 counting only the distinct ones).

The product of its (nonzero) digits is 10616832, while the sum is 57.

The spelling of 866808429240 in words is "eight hundred sixty-six billion, eight hundred eight million, four hundred twenty-nine thousand, two hundred forty".