866782950852 has 192 divisors, whose sum is σ = 2631691059200. Its totient is φ = 215623503360.

The previous prime is 866782950827. The next prime is 866782950853. The reversal of 866782950852 is 258059287668.

It is not an unprimeable number, because it can be changed into a prime (866782950853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4660077 + ... + 4842507.

Almost surely, 2^866782950852 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 866782950852, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1315845529600).

866782950852 is an abundant number, since it is smaller than the sum of its proper divisors (1764908108348).

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

866782950852 is a wasteful number, since it uses less digits than its factorization.

866782950852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182706 (or 182704 counting only the distinct ones).

The product of its (nonzero) digits is 116121600, while the sum is 66.

The spelling of 866782950852 in words is "eight hundred sixty-six billion, seven hundred eighty-two million, nine hundred fifty thousand, eight hundred fifty-two".