82021028660 has 48 divisors (see below), whose sum is σ = 172749507840. Its totient is φ = 32712301440.

The previous prime is 82021028659. The next prime is 82021028711. The reversal of 82021028660 is 6682012028.

It is a self number, because there is not a number n which added to its sum of digits gives 82021028660.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 10691306 + ... + 10698974.

It is an arithmetic number, because the mean of its divisors is an integer number (3598948080).

Almost surely, 2^82021028660 is an apocalyptic number.

It is an amenable number.

82021028660 is an abundant number, since it is smaller than the sum of its proper divisors (90728479180).

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

82021028660 is a wasteful number, since it uses less digits than its factorization.

82021028660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9176 (or 9174 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The spelling of 82021028660 in words is "eighty-two billion, twenty-one million, twenty-eight thousand, six hundred sixty".