63966668 has 12 divisors (see below), whose sum is σ = 112003920. Its totient is φ = 31965552.

The previous prime is 63966659. The next prime is 63966731. The reversal of 63966668 is 86666936.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6818 + ... + 13206.

It is an arithmetic number, because the mean of its divisors is an integer number (9333660).

Almost surely, 2^63966668 is an apocalyptic number.

It is an amenable number.

63966668 is a deficient number, since it is larger than the sum of its proper divisors (48037252).

63966668 is a wasteful number, since it uses less digits than its factorization.

63966668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8896 (or 8894 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 50.

The square root of 63966668 is about 7997.9164786837. The cubic root of 63966668 is about 399.9305462745.

The spelling of 63966668 in words is "sixty-three million, nine hundred sixty-six thousand, six hundred sixty-eight".