63706668 has 12 divisors (see below), whose sum is σ = 148648920. Its totient is φ = 21235552.

The previous prime is 63706651. The next prime is 63706673. The reversal of 63706668 is 86660736.

It is a tau number, because it is divible by the number of its divisors (12).

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, 2654433 + ... + 2654456.

It is an arithmetic number, because the mean of its divisors is an integer number (12387410).

Almost surely, 2^63706668 is an apocalyptic number.

It is an amenable number.

63706668 is an abundant number, since it is smaller than the sum of its proper divisors (84942252).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63706668 is a wasteful number, since it uses less digits than its factorization.

63706668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5308896 (or 5308894 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 42.

The square root of 63706668 is about 7981.6456949679. The cubic root of 63706668 is about 399.3879556486.

The spelling of 63706668 in words is "sixty-three million, seven hundred six thousand, six hundred sixty-eight".