823668663 has 8 divisors (see below), whose sum is σ = 1145973888. Its totient is φ = 525237944.

The previous prime is 823668661. The next prime is 823668719. The reversal of 823668663 is 366866328.

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 823668663 - 2¹ = 823668661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823668661) 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, 5968545 + ... + 5968682.

It is an arithmetic number, because the mean of its divisors is an integer number (143246736).

Almost surely, 2^823668663 is an apocalyptic number.

823668663 is a deficient number, since it is larger than the sum of its proper divisors (322305225).

823668663 is a wasteful number, since it uses less digits than its factorization.

823668663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11937253.

The product of its digits is 1492992, while the sum is 48.

The square root of 823668663 is about 28699.6282728540. The cubic root of 823668663 is about 937.3839526402.

The spelling of 823668663 in words is "eight hundred twenty-three million, six hundred sixty-eight thousand, six hundred sixty-three".