63878664 has 16 divisors (see below), whose sum is σ = 159696720. Its totient is φ = 21292880.

The previous prime is 63878663. The next prime is 63878681. The reversal of 63878664 is 46687836.

It is a happy number.

63878664 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 (63878663) 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 3 ways as a sum of consecutive naturals, for example, 1330782 + ... + 1330829.

It is an arithmetic number, because the mean of its divisors is an integer number (9981045).

Almost surely, 2^63878664 is an apocalyptic number.

It is an amenable number.

63878664 is an abundant number, since it is smaller than the sum of its proper divisors (95818056).

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

63878664 is a wasteful number, since it uses less digits than its factorization.

63878664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2661620 (or 2661616 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 48.

The square root of 63878664 is about 7992.4129022467. The cubic root of 63878664 is about 399.7470567497.

It can be divided in two parts, 6387 and 8664, that added together give a palindrome (15051).

The spelling of 63878664 in words is "sixty-three million, eight hundred seventy-eight thousand, six hundred sixty-four".