663259823 has 4 divisors (see below), whose sum is σ = 672345648. Its totient is φ = 654174000.

The previous prime is 663259781. The next prime is 663259837. The reversal of 663259823 is 328952366.

663259823 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 663259823 - 2⁶ = 663259759 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663259843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4542803 + ... + 4542948.

It is an arithmetic number, because the mean of its divisors is an integer number (168086412).

Almost surely, 2^663259823 is an apocalyptic number.

663259823 is a deficient number, since it is larger than the sum of its proper divisors (9085825).

663259823 is an equidigital number, since it uses as much as digits as its factorization.

663259823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9085824.

The product of its digits is 466560, while the sum is 44.

The square root of 663259823 is about 25753.8312295472. The cubic root of 663259823 is about 872.0898466572.

The spelling of 663259823 in words is "six hundred sixty-three million, two hundred fifty-nine thousand, eight hundred twenty-three".