63811668 has 12 divisors (see below), whose sum is σ = 148893920. Its totient is φ = 21270552.

The previous prime is 63811663. The next prime is 63811681. The reversal of 63811668 is 86611836.

63811668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63811663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2658808 + ... + 2658831.

Almost surely, 2^63811668 is an apocalyptic number.

It is an amenable number.

63811668 is an abundant number, since it is smaller than the sum of its proper divisors (85082252).

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

63811668 is a wasteful number, since it uses less digits than its factorization.

63811668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5317646 (or 5317644 counting only the distinct ones).

The product of its digits is 41472, while the sum is 39.

The square root of 63811668 is about 7988.2205778258. The cubic root of 63811668 is about 399.6072561736.

The spelling of 63811668 in words is "sixty-three million, eight hundred eleven thousand, six hundred sixty-eight".