663663355 has 4 divisors (see below), whose sum is σ = 796396032. Its totient is φ = 530930680.

The previous prime is 663663337. The next prime is 663663361. The reversal of 663663355 is 553366366.

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

It is not a de Polignac number, because 663663355 - 2¹⁵ = 663630587 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66366331 + ... + 66366340.

It is an arithmetic number, because the mean of its divisors is an integer number (199099008).

Almost surely, 2^663663355 is an apocalyptic number.

663663355 is a deficient number, since it is larger than the sum of its proper divisors (132732677).

663663355 is a wasteful number, since it uses less digits than its factorization.

663663355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132732676.

The product of its digits is 874800, while the sum is 43.

The square root of 663663355 is about 25761.6644454507. The cubic root of 663663355 is about 872.2666726926.

The spelling of 663663355 in words is "six hundred sixty-three million, six hundred sixty-three thousand, three hundred fifty-five".