63813966 has 8 divisors (see below), whose sum is σ = 127627944. Its totient is φ = 21271320.

The previous prime is 63813947. The next prime is 63813973. The reversal of 63813966 is 66931836.

It is a sphenic number, since it is the product of 3 distinct primes.

63813966 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5317825 + ... + 5317836.

It is an arithmetic number, because the mean of its divisors is an integer number (15953493).

Almost surely, 2^63813966 is an apocalyptic number.

63813966 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

63813966 is a wasteful number, since it uses less digits than its factorization.

63813966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10635666.

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

The square root of 63813966 is about 7988.3644133202. The cubic root of 63813966 is about 399.6120530312.

The spelling of 63813966 in words is "sixty-three million, eight hundred thirteen thousand, nine hundred sixty-six".