3663118638 has 24 divisors (see below), whose sum is σ = 8086509288. Its totient is φ = 1198000752.

The previous prime is 3663118633. The next prime is 3663118649. The reversal of 3663118638 is 8368113663.

3663118638 is a `hidden beast` number, since 3 + 6 + 6 + 3 + 1 + 1 + 8 + 638 = 666.

3663118638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 3663118593 and 3663118602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3663118633) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1918920 + ... + 1920827.

It is an arithmetic number, because the mean of its divisors is an integer number (336937887).

Almost surely, 2^3663118638 is an apocalyptic number.

3663118638 is an abundant number, since it is smaller than the sum of its proper divisors (4423390650).

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

3663118638 is a wasteful number, since it uses less digits than its factorization.

3663118638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3839808 (or 3839805 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 3663118638 is about 60523.7031087821. The cubic root of 3663118638 is about 1541.5241331146.

The spelling of 3663118638 in words is "three billion, six hundred sixty-three million, one hundred eighteen thousand, six hundred thirty-eight".