63668405 has 8 divisors (see below), whose sum is σ = 76723200. Its totient is φ = 50720656.

The previous prime is 63668401. The next prime is 63668431. The reversal of 63668405 is 50486636.

63668405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 63668405 - 2² = 63668401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63668401) 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 7 ways as a sum of consecutive naturals, for example, 25445 + ... + 27834.

It is an arithmetic number, because the mean of its divisors is an integer number (9590400).

Almost surely, 2^63668405 is an apocalyptic number.

It is an amenable number.

63668405 is a deficient number, since it is larger than the sum of its proper divisors (13054795).

63668405 is a wasteful number, since it uses less digits than its factorization.

63668405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53523.

The product of its (nonzero) digits is 103680, while the sum is 38.

The square root of 63668405 is about 7979.2483981889. The cubic root of 63668405 is about 399.3079805464.

The spelling of 63668405 in words is "sixty-three million, six hundred sixty-eight thousand, four hundred five".