663862589 has 12 divisors (see below), whose sum is σ = 720501012. Its totient is φ = 611395200.

The previous prime is 663862583. The next prime is 663862601. The reversal of 663862589 is 985268366.

It can be written as a sum of positive squares in 6 ways, for example, as 147209689 + 516652900 = 12133^2 + 22730^2 .

It is not a de Polignac number, because 663862589 - 2⁸ = 663862333 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 663862589.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663862583) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73649 + ... + 82169.

It is an arithmetic number, because the mean of its divisors is an integer number (60041751).

Almost surely, 2^663862589 is an apocalyptic number.

It is an amenable number.

663862589 is a deficient number, since it is larger than the sum of its proper divisors (56638423).

663862589 is a wasteful number, since it uses less digits than its factorization.

663862589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9008 (or 8995 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 53.

The square root of 663862589 is about 25765.5310249954. The cubic root of 663862589 is about 872.3539497684.

The spelling of 663862589 in words is "six hundred sixty-three million, eight hundred sixty-two thousand, five hundred eighty-nine".