663303055 has 4 divisors (see below), whose sum is σ = 795963672. Its totient is φ = 530642440.

The previous prime is 663303037. The next prime is 663303061. The reversal of 663303055 is 550303366.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 663303055 - 2⁵ = 663303023 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66330301 + ... + 66330310.

It is an arithmetic number, because the mean of its divisors is an integer number (198990918).

Almost surely, 2^663303055 is an apocalyptic number.

663303055 is a deficient number, since it is larger than the sum of its proper divisors (132660617).

663303055 is a wasteful number, since it uses less digits than its factorization.

663303055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132660616.

The product of its (nonzero) digits is 24300, while the sum is 31.

The square root of 663303055 is about 25754.6705473007. The cubic root of 663303055 is about 872.1087941686.

The spelling of 663303055 in words is "six hundred sixty-three million, three hundred three thousand, fifty-five".