663613573 has 4 divisors (see below), whose sum is σ = 758415520. Its totient is φ = 568811628.

The previous prime is 663613519. The next prime is 663613579. The reversal of 663613573 is 375316366.

663613573 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 663613573 - 2²⁹ = 126742661 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 (663613579) 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, 47400963 + ... + 47400976.

It is an arithmetic number, because the mean of its divisors is an integer number (189603880).

Almost surely, 2^663613573 is an apocalyptic number.

It is an amenable number.

663613573 is a deficient number, since it is larger than the sum of its proper divisors (94801947).

663613573 is an equidigital number, since it uses as much as digits as its factorization.

663613573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94801946.

The product of its digits is 204120, while the sum is 40.

The square root of 663613573 is about 25760.6982242330. The cubic root of 663613573 is about 872.2448623048.

The spelling of 663613573 in words is "six hundred sixty-three million, six hundred thirteen thousand, five hundred seventy-three".