63668689 has 32 divisors (see below), whose sum is σ = 80352000. Its totient is φ = 50238720.

The previous prime is 63668653. The next prime is 63668701. The reversal of 63668689 is 98686636.

It is a happy number.

63668689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 63668689 - 2¹¹ = 63666641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63668089) 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 31 ways as a sum of consecutive naturals, for example, 355602 + ... + 355780.

It is an arithmetic number, because the mean of its divisors is an integer number (2511000).

Almost surely, 2^63668689 is an apocalyptic number.

It is an amenable number.

63668689 is a deficient number, since it is larger than the sum of its proper divisors (16683311).

63668689 is a wasteful number, since it uses less digits than its factorization.

63668689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278 (or 264 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 52.

The square root of 63668689 is about 7979.2661943314. The cubic root of 63668689 is about 399.3085742648.

The spelling of 63668689 in words is "sixty-three million, six hundred sixty-eight thousand, six hundred eighty-nine".