63006640 has 40 divisors (see below), whose sum is σ = 146820960. Its totient is φ = 25145856.

The previous prime is 63006613. The next prime is 63006659. The reversal of 63006640 is 4660036.

It is a happy number.

63006640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 68101 + ... + 69019.

It is an arithmetic number, because the mean of its divisors is an integer number (3670524).

Almost surely, 2^63006640 is an apocalyptic number.

It is an amenable number.

63006640 is an abundant number, since it is smaller than the sum of its proper divisors (83814320).

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

63006640 is a wasteful number, since it uses less digits than its factorization.

63006640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1789 (or 1783 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 63006640 is about 7937.6722028565. The cubic root of 63006640 is about 397.9196996318.

Adding to 63006640 its reverse (4660036), we get a palindrome (67666676).

The spelling of 63006640 in words is "sixty-three million, six thousand, six hundred forty".