63664650 has 96 divisors (see below), whose sum is σ = 200522880. Its totient is φ = 14549760.

The previous prime is 63664633. The next prime is 63664651. The reversal of 63664650 is 5646636.

63664650 is a `hidden beast` number, since 6 + 3 + 6 + 646 + 5 + 0 = 666.

63664650 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (63664651) 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 47 ways as a sum of consecutive naturals, for example, 6082 + ... + 12818.

It is an arithmetic number, because the mean of its divisors is an integer number (2088780).

Almost surely, 2^63664650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63664650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100261440).

63664650 is an abundant number, since it is smaller than the sum of its proper divisors (136858230).

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

63664650 is a wasteful number, since it uses less digits than its factorization.

63664650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6765 (or 6754 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The square root of 63664650 is about 7979.0130968686. The cubic root of 63664650 is about 399.3001303370.

The spelling of 63664650 in words is "sixty-three million, six hundred sixty-four thousand, six hundred fifty".