663564343 has 4 divisors (see below), whose sum is σ = 714607768. Its totient is φ = 612520920.

The previous prime is 663564337. The next prime is 663564397. The reversal of 663564343 is 343465366.

It is a happy number.

663564343 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: 343465366 = 2 ⋅171732683.

It is a cyclic number.

It is not a de Polignac number, because 663564343 - 2⁵ = 663564311 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 663564296 and 663564305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663564443) 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, 25521693 + ... + 25521718.

It is an arithmetic number, because the mean of its divisors is an integer number (178651942).

Almost surely, 2^663564343 is an apocalyptic number.

663564343 is a deficient number, since it is larger than the sum of its proper divisors (51043425).

663564343 is a wasteful number, since it uses less digits than its factorization.

663564343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51043424.

The product of its digits is 466560, while the sum is 40.

The square root of 663564343 is about 25759.7426811682. The cubic root of 663564343 is about 872.2232926855.

The spelling of 663564343 in words is "six hundred sixty-three million, five hundred sixty-four thousand, three hundred forty-three".