866091452884 has 48 divisors (see below), whose sum is σ = 1893239792640. Its totient is φ = 338078522880.

The previous prime is 866091452881. The next prime is 866091452899. The reversal of 866091452884 is 488254190668.

It is a super-2 number, since 2×866091452884² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866091452881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29332339 + ... + 29361850.

It is an arithmetic number, because the mean of its divisors is an integer number (39442495680).

Almost surely, 2^866091452884 is an apocalyptic number.

It is an amenable number.

866091452884 is an abundant number, since it is smaller than the sum of its proper divisors (1027148339756).

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

866091452884 is a wasteful number, since it uses less digits than its factorization.

866091452884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58694248 (or 58694246 counting only the distinct ones).

The product of its (nonzero) digits is 26542080, while the sum is 61.

The spelling of 866091452884 in words is "eight hundred sixty-six billion, ninety-one million, four hundred fifty-two thousand, eight hundred eighty-four".