63665008 has 40 divisors (see below), whose sum is σ = 136598400. Its totient is φ = 28501440.

The previous prime is 63664981. The next prime is 63665009. The reversal of 63665008 is 80056636.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63665009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9093 + ... + 14491.

It is an arithmetic number, because the mean of its divisors is an integer number (3414960).

Almost surely, 2^63665008 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 63665008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68299200).

63665008 is an abundant number, since it is smaller than the sum of its proper divisors (72933392).

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

63665008 is a wasteful number, since it uses less digits than its factorization.

63665008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5485 (or 5479 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 63665008 is about 7979.0355306892. The cubic root of 63665008 is about 399.3008787857.

The spelling of 63665008 in words is "sixty-three million, six hundred sixty-five thousand, eight".