663005889 has 96 divisors (see below), whose sum is σ = 1252253184. Its totient is φ = 328458240.

The previous prime is 663005887. The next prime is 663005911. The reversal of 663005889 is 988500366.

663005889 is a `hidden beast` number, since 6 + 63 + 0 + 0 + 588 + 9 = 666.

It is not a de Polignac number, because 663005889 - 2¹ = 663005887 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (663005887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1148769 + ... + 1149345.

It is an arithmetic number, because the mean of its divisors is an integer number (13044304).

Almost surely, 2^663005889 is an apocalyptic number.

663005889 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

It is an amenable number.

663005889 is a deficient number, since it is larger than the sum of its proper divisors (589247295).

663005889 is a wasteful number, since it uses less digits than its factorization.

663005889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687 (or 684 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 663005889 is about 25748.9007338177. The cubic root of 663005889 is about 871.9785370703.

The spelling of 663005889 in words is "six hundred sixty-three million, five thousand, eight hundred eighty-nine".