823666552 has 16 divisors (see below), whose sum is σ = 1545481440. Its totient is φ = 411538176.

The previous prime is 823666537. The next prime is 823666553. The reversal of 823666552 is 255666328.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 823666499 and 823666508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823666553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24793 + ... + 47560.

It is an arithmetic number, because the mean of its divisors is an integer number (96592590).

Almost surely, 2^823666552 is an apocalyptic number.

It is an amenable number.

823666552 is a deficient number, since it is larger than the sum of its proper divisors (721814888).

823666552 is a wasteful number, since it uses less digits than its factorization.

823666552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73782 (or 73778 counting only the distinct ones).

The product of its digits is 518400, while the sum is 43.

The square root of 823666552 is about 28699.5914953506. The cubic root of 823666552 is about 937.3831518250.

The spelling of 823666552 in words is "eight hundred twenty-three million, six hundred sixty-six thousand, five hundred fifty-two".