63668417 has 4 divisors (see below), whose sum is σ = 67413636. Its totient is φ = 59923200.

The previous prime is 63668401. The next prime is 63668431. The reversal of 63668417 is 71486636.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20647936 + 43020481 = 4544^2 + 6559^2 .

It is a cyclic number.

It is not a de Polignac number, because 63668417 - 2⁴ = 63668401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63668467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1872584 + ... + 1872617.

It is an arithmetic number, because the mean of its divisors is an integer number (16853409).

Almost surely, 2^63668417 is an apocalyptic number.

It is an amenable number.

63668417 is a deficient number, since it is larger than the sum of its proper divisors (3745219).

63668417 is a wasteful number, since it uses less digits than its factorization.

63668417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3745218.

The product of its digits is 145152, while the sum is 41.

The square root of 63668417 is about 7979.2491501394. The cubic root of 63668417 is about 399.3080056332.

The spelling of 63668417 in words is "sixty-three million, six hundred sixty-eight thousand, four hundred seventeen".