63660240 has 240 divisors, whose sum is σ = 259054848. Its totient is φ = 13676544.

The previous prime is 63660229. The next prime is 63660263. The reversal of 63660240 is 4206636.

63660240 is a `hidden beast` number, since 636 + 6 + 0 + 24 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 85309 + ... + 86051.

Almost surely, 2^63660240 is an apocalyptic number.

63660240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63660240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129527424).

63660240 is an abundant number, since it is smaller than the sum of its proper divisors (195394608).

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

63660240 is a wasteful number, since it uses less digits than its factorization.

63660240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786 (or 777 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 63660240 is about 7978.7367421165. The cubic root of 63660240 is about 399.2909103893.

Adding to 63660240 its reverse (4206636), we get a palindrome (67866876).

The spelling of 63660240 in words is "sixty-three million, six hundred sixty thousand, two hundred forty".