663606055 has 16 divisors (see below), whose sum is σ = 910600704. Its totient is φ = 454788000.

The previous prime is 663606023. The next prime is 663606059. The reversal of 663606055 is 550606366.

It is a happy number.

It is not a de Polignac number, because 663606055 - 2⁵ = 663606023 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 (663606059) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 74574 + ... + 82996.

It is an arithmetic number, because the mean of its divisors is an integer number (56912544).

Almost surely, 2^663606055 is an apocalyptic number.

663606055 is a deficient number, since it is larger than the sum of its proper divisors (246994649).

663606055 is a wasteful number, since it uses less digits than its factorization.

663606055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10686.

The product of its (nonzero) digits is 97200, while the sum is 37.

The square root of 663606055 is about 25760.5523038618. The cubic root of 663606055 is about 872.2415684393.

The spelling of 663606055 in words is "six hundred sixty-three million, six hundred six thousand, fifty-five".