823666677828 has 24 divisors (see below), whose sum is σ = 1922354491680. Its totient is φ = 274489048320.

The previous prime is 823666677781. The next prime is 823666677859. The reversal of 823666677828 is 828776666328.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 8262258 + ... + 8361353.

It is an arithmetic number, because the mean of its divisors is an integer number (80098103820).

Almost surely, 2^823666677828 is an apocalyptic number.

It is an amenable number.

823666677828 is an abundant number, since it is smaller than the sum of its proper divisors (1098687813852).

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

823666677828 is a wasteful number, since it uses less digits than its factorization.

823666677828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16627747 (or 16627745 counting only the distinct ones).

The product of its digits is 390168576, while the sum is 69.

The spelling of 823666677828 in words is "eight hundred twenty-three billion, six hundred sixty-six million, six hundred seventy-seven thousand, eight hundred twenty-eight".