63808668 has 96 divisors (see below), whose sum is σ = 206277120. Its totient is φ = 16571520.

The previous prime is 63808663. The next prime is 63808673. The reversal of 63808668 is 86680836.

63808668 is a `hidden beast` number, since 638 + 0 + 8 + 6 + 6 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (63808663) and next prime (63808673).

It is a super-2 number, since 2×63808668² = 8143092223868448, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63808663) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4480 + ... + 12152.

It is an arithmetic number, because the mean of its divisors is an integer number (2148720).

Almost surely, 2^63808668 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 63808668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103138560).

63808668 is an abundant number, since it is smaller than the sum of its proper divisors (142468452).

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

63808668 is a wasteful number, since it uses less digits than its factorization.

63808668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7704 (or 7696 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 63808668 is about 7988.0327991315. The cubic root of 63808668 is about 399.6009937841.

The spelling of 63808668 in words is "sixty-three million, eight hundred eight thousand, six hundred sixty-eight".