82408866221 has 8 divisors (see below), whose sum is σ = 89907753600. Its totient is φ = 74911174240.

The previous prime is 82408866187. The next prime is 82408866229. The reversal of 82408866221 is 12266880428.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 82408866221 - 2³⁰ = 81335124397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82408866229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151541 + ... + 433338.

It is an arithmetic number, because the mean of its divisors is an integer number (11238469200).

Almost surely, 2^82408866221 is an apocalyptic number.

It is an amenable number.

82408866221 is a deficient number, since it is larger than the sum of its proper divisors (7498887379).

82408866221 is a wasteful number, since it uses less digits than its factorization.

82408866221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597699.

The product of its (nonzero) digits is 589824, while the sum is 47.

The spelling of 82408866221 in words is "eighty-two billion, four hundred eight million, eight hundred sixty-six thousand, two hundred twenty-one".