866324728320 has 80 divisors (see below), whose sum is σ = 2769531890400. Its totient is φ = 231019925504.

The previous prime is 866324728309. The next prime is 866324728333. The reversal of 866324728320 is 23827423668.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 56393670 + ... + 56409029.

It is an arithmetic number, because the mean of its divisors is an integer number (34619148630).

Almost surely, 2^866324728320 is an apocalyptic number.

866324728320 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

866324728320 is an abundant number, since it is smaller than the sum of its proper divisors (1903207162080).

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

866324728320 is a wasteful number, since it uses less digits than its factorization.

866324728320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112802725 (or 112802709 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 51.

The spelling of 866324728320 in words is "eight hundred sixty-six billion, three hundred twenty-four million, seven hundred twenty-eight thousand, three hundred twenty".