623663663 has 4 divisors (see below), whose sum is σ = 712758480. Its totient is φ = 534568848.

The previous prime is 623663629. The next prime is 623663681. The reversal of 623663663 is 366366326.

623663663 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, and also an emirpimes, since its reverse is a distinct semiprime: 366366326 = 2 ⋅183183163.

It is a cyclic number.

It is not a de Polignac number, because 623663663 - 2¹² = 623659567 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 623663663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623663063) 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, 44547398 + ... + 44547411.

It is an arithmetic number, because the mean of its divisors is an integer number (178189620).

Almost surely, 2^623663663 is an apocalyptic number.

623663663 is a deficient number, since it is larger than the sum of its proper divisors (89094817).

623663663 is an equidigital number, since it uses as much as digits as its factorization.

623663663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89094816.

The product of its digits is 419904, while the sum is 41.

The square root of 623663663 is about 24973.2589583338. The cubic root of 623663663 is about 854.3781774217.

The spelling of 623663663 in words is "six hundred twenty-three million, six hundred sixty-three thousand, six hundred sixty-three".