3663661716 has 216 divisors, whose sum is σ = 11321436672. Its totient is φ = 991267200.

The previous prime is 3663661711. The next prime is 3663661717. The reversal of 3663661716 is 6171663663.

3663661716 is a `hidden beast` number, since 3 + 6 + 636 + 6 + 1 + 7 + 1 + 6 = 666.

3663661716 is digitally balanced in base 2, because in such base 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 (3663661711) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1754425 + ... + 1756511.

Almost surely, 2^3663661716 is an apocalyptic number.

3663661716 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3663661716, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5660718336).

3663661716 is an abundant number, since it is smaller than the sum of its proper divisors (7657774956).

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

3663661716 is a wasteful number, since it uses less digits than its factorization.

3663661716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2163 (or 2147 counting only the distinct ones).

The product of its digits is 489888, while the sum is 45.

The square root of 3663661716 is about 60528.1894326933. The cubic root of 3663661716 is about 1541.6003092328.

The spelling of 3663661716 in words is "three billion, six hundred sixty-three million, six hundred sixty-one thousand, seven hundred sixteen".