663655065 has 16 divisors (see below), whose sum is σ = 1066411008. Its totient is φ = 352428416.

The previous prime is 663655043. The next prime is 663655067. The reversal of 663655065 is 560556366.

663655065 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 663655065 - 2¹³ = 663646873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (663655067) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91449 + ... + 98438.

It is an arithmetic number, because the mean of its divisors is an integer number (66650688).

Almost surely, 2^663655065 is an apocalyptic number.

It is an amenable number.

663655065 is a deficient number, since it is larger than the sum of its proper divisors (402755943).

663655065 is a wasteful number, since it uses less digits than its factorization.

663655065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190128.

The product of its (nonzero) digits is 486000, while the sum is 42.

The square root of 663655065 is about 25761.5035469594. The cubic root of 663655065 is about 872.2630407704.

The spelling of 663655065 in words is "six hundred sixty-three million, six hundred fifty-five thousand, sixty-five".