63660064 has 48 divisors (see below), whose sum is σ = 136078488. Its totient is φ = 29140992.

The previous prime is 63660061. The next prime is 63660073. The reversal of 63660064 is 46006636.

It can be written as a sum of positive squares in 4 ways, for example, as 28944400 + 34715664 = 5380^2 + 5892^2 .

It is not an unprimeable number, because it can be changed into a prime (63660061) 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, 56434 + ... + 57550.

Almost surely, 2^63660064 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 63660064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68039244).

63660064 is an abundant number, since it is smaller than the sum of its proper divisors (72418424).

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

63660064 is a wasteful number, since it uses less digits than its factorization.

63660064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1277 (or 1269 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 63660064 is about 7978.7257127940. The cubic root of 63660064 is about 399.2905424188.

The spelling of 63660064 in words is "sixty-three million, six hundred sixty thousand, sixty-four".