63966138 has 16 divisors (see below), whose sum is σ = 135457920. Its totient is φ = 20067776.

The previous prime is 63966137. The next prime is 63966157. The reversal of 63966138 is 83166936.

63966138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 63966138.

It is not an unprimeable number, because it can be changed into a prime (63966131) 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 7 ways as a sum of consecutive naturals, for example, 313458 + ... + 313661.

It is an arithmetic number, because the mean of its divisors is an integer number (8466120).

Almost surely, 2^63966138 is an apocalyptic number.

63966138 is an abundant number, since it is smaller than the sum of its proper divisors (71491782).

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

63966138 is a wasteful number, since it uses less digits than its factorization.

63966138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627141.

The product of its digits is 139968, while the sum is 42.

The square root of 63966138 is about 7997.8833449857. The cubic root of 63966138 is about 399.9294417212.

The spelling of 63966138 in words is "sixty-three million, nine hundred sixty-six thousand, one hundred thirty-eight".