3663988668 has 120 divisors (see below), whose sum is σ = 9849525840. Its totient is φ = 1187239680.

The previous prime is 3663988667. The next prime is 3663988693. The reversal of 3663988668 is 8668893663.

3663988668 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3663988661) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1757955 + ... + 1760037.

It is an arithmetic number, because the mean of its divisors is an integer number (82079382).

Almost surely, 2^3663988668 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3663988668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4924762920).

3663988668 is an abundant number, since it is smaller than the sum of its proper divisors (6185537172).

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

3663988668 is a wasteful number, since it uses less digits than its factorization.

3663988668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2249 (or 2238 counting only the distinct ones).

The product of its digits is 53747712, while the sum is 63.

The square root of 3663988668 is about 60530.8901966591. The cubic root of 3663988668 is about 1541.6461662970.

The spelling of 3663988668 in words is "three billion, six hundred sixty-three million, nine hundred eighty-eight thousand, six hundred sixty-eight".