820466865560 has 16 divisors (see below), whose sum is σ = 1846050447600. Its totient is φ = 328186746208.

The previous prime is 820466865557. The next prime is 820466865577. The reversal of 820466865560 is 65568664028.

It is a super-2 number, since 2×820466865560² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 820466865496 and 820466865505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10255835780 + ... + 10255835859.

It is an arithmetic number, because the mean of its divisors is an integer number (115378152975).

Almost surely, 2^820466865560 is an apocalyptic number.

It is an amenable number.

820466865560 is an abundant number, since it is smaller than the sum of its proper divisors (1025583582040).

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

820466865560 is a wasteful number, since it uses less digits than its factorization.

820466865560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20511671650 (or 20511671646 counting only the distinct ones).

The product of its (nonzero) digits is 16588800, while the sum is 56.

The spelling of 820466865560 in words is "eight hundred twenty billion, four hundred sixty-six million, eight hundred sixty-five thousand, five hundred sixty".