63666589 has 8 divisors (see below), whose sum is σ = 72836928. Its totient is φ = 54515040.

The previous prime is 63666539. The next prime is 63666593. The reversal of 63666589 is 98566636.

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 63666589 - 2⁹ = 63666077 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 (63666509) 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 7 ways as a sum of consecutive naturals, for example, 3534 + ... + 11824.

It is an arithmetic number, because the mean of its divisors is an integer number (9104616).

Almost surely, 2^63666589 is an apocalyptic number.

It is an amenable number.

63666589 is a deficient number, since it is larger than the sum of its proper divisors (9170339).

63666589 is a wasteful number, since it uses less digits than its factorization.

63666589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9395.

The product of its digits is 1399680, while the sum is 49.

The square root of 63666589 is about 7979.1346021984. The cubic root of 63666589 is about 399.3041840523.

The spelling of 63666589 in words is "sixty-three million, six hundred sixty-six thousand, five hundred eighty-nine".