663243053 has 4 divisors (see below), whose sum is σ = 723537888. Its totient is φ = 602948220.

The previous prime is 663243037. The next prime is 663243073. The reversal of 663243053 is 350342366.

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 a cyclic number.

It is not a de Polignac number, because 663243053 - 2⁴ = 663243037 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 (663243023) 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, 30147401 + ... + 30147422.

It is an arithmetic number, because the mean of its divisors is an integer number (180884472).

Almost surely, 2^663243053 is an apocalyptic number.

It is an amenable number.

663243053 is a deficient number, since it is larger than the sum of its proper divisors (60294835).

663243053 is a wasteful number, since it uses less digits than its factorization.

663243053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60294834.

The product of its (nonzero) digits is 38880, while the sum is 32.

The square root of 663243053 is about 25753.5056448632. The cubic root of 663243053 is about 872.0824965613.

The spelling of 663243053 in words is "six hundred sixty-three million, two hundred forty-three thousand, fifty-three".