3968663664 has 80 divisors (see below), whose sum is σ = 11956179200. Its totient is φ = 1133899200.

The previous prime is 3968663663. The next prime is 3968663681. The reversal of 3968663664 is 4663668693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3968663663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104062 + ... + 136989.

It is an arithmetic number, because the mean of its divisors is an integer number (149452240).

Almost surely, 2^3968663664 is an apocalyptic number.

It is an amenable number.

3968663664 is an abundant number, since it is smaller than the sum of its proper divisors (7987515536).

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

3968663664 is a wasteful number, since it uses less digits than its factorization.

3968663664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241083 (or 241063 counting only the distinct ones).

The product of its digits is 20155392, while the sum is 57.

The square root of 3968663664 is about 62997.3306101139. The cubic root of 3968663664 is about 1583.2449020626.

The spelling of 3968663664 in words is "three billion, nine hundred sixty-eight million, six hundred sixty-three thousand, six hundred sixty-four".