63966216 has 32 divisors (see below), whose sum is σ = 160322400. Its totient is φ = 21267840.

The previous prime is 63966209. The next prime is 63966263. The reversal of 63966216 is 61266936.

It is a happy number.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6876 + ... + 13236.

It is an arithmetic number, because the mean of its divisors is an integer number (5010075).

Almost surely, 2^63966216 is an apocalyptic number.

It is an amenable number.

63966216 is an abundant number, since it is smaller than the sum of its proper divisors (96356184).

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

63966216 is a wasteful number, since it uses less digits than its factorization.

63966216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6789 (or 6785 counting only the distinct ones).

The product of its digits is 69984, while the sum is 39.

The square root of 63966216 is about 7997.8882212744. Note that the first 3 decimals coincide. The cubic root of 63966216 is about 399.9296042785.

The spelling of 63966216 in words is "sixty-three million, nine hundred sixty-six thousand, two hundred sixteen".