68563663 has 4 divisors (see below), whose sum is σ = 78358480. Its totient is φ = 58768848.

The previous prime is 68563657. The next prime is 68563673. The reversal of 68563663 is 36636586.

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 68563663 - 2⁹ = 68563151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68563643) 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, 4897398 + ... + 4897411.

It is an arithmetic number, because the mean of its divisors is an integer number (19589620).

Almost surely, 2^68563663 is an apocalyptic number.

68563663 is a deficient number, since it is larger than the sum of its proper divisors (9794817).

68563663 is an equidigital number, since it uses as much as digits as its factorization.

68563663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9794816.

The product of its digits is 466560, while the sum is 43.

The square root of 68563663 is about 8280.3178079105. The cubic root of 68563663 is about 409.2901916504.

The spelling of 68563663 in words is "sixty-eight million, five hundred sixty-three thousand, six hundred sixty-three".