63996686 has 16 divisors (see below), whose sum is σ = 105076608. Its totient is φ = 29052000.

The previous prime is 63996683. The next prime is 63996701. The reversal of 63996686 is 68669936.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63996683) 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 7 ways as a sum of consecutive naturals, for example, 18590 + ... + 21761.

It is an arithmetic number, because the mean of its divisors is an integer number (6567288).

Almost surely, 2^63996686 is an apocalyptic number.

63996686 is a deficient number, since it is larger than the sum of its proper divisors (41079922).

63996686 is a wasteful number, since it uses less digits than its factorization.

63996686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40427.

The product of its digits is 2519424, while the sum is 53.

The square root of 63996686 is about 7999.7928723186. The cubic root of 63996686 is about 399.9930957142.

The spelling of 63996686 in words is "sixty-three million, nine hundred ninety-six thousand, six hundred eighty-six".