663768055 has 8 divisors (see below), whose sum is σ = 796824000. Its totient is φ = 530812896.

The previous prime is 663768019. The next prime is 663768089. The reversal of 663768055 is 550867366.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 663768055 - 2¹⁵ = 663735287 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 663767996 and 663768014.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9855 + ... + 37744.

It is an arithmetic number, because the mean of its divisors is an integer number (99603000).

Almost surely, 2^663768055 is an apocalyptic number.

663768055 is a deficient number, since it is larger than the sum of its proper divisors (133055945).

663768055 is a wasteful number, since it uses less digits than its factorization.

663768055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50393.

The product of its (nonzero) digits is 907200, while the sum is 46.

The square root of 663768055 is about 25763.6964545075. The cubic root of 663768055 is about 872.3125400829.

The spelling of 663768055 in words is "six hundred sixty-three million, seven hundred sixty-eight thousand, fifty-five".