63994566 has 8 divisors (see below), whose sum is σ = 127989144. Its totient is φ = 21331520.

The previous prime is 63994549. The next prime is 63994573. The reversal of 63994566 is 66549936.

It is a happy number.

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

63994566 is an admirable 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, 5332875 + ... + 5332886.

It is an arithmetic number, because the mean of its divisors is an integer number (15998643).

Almost surely, 2^63994566 is an apocalyptic number.

63994566 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.

63994566 is a wasteful number, since it uses less digits than its factorization.

63994566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10665766.

The product of its digits is 1049760, while the sum is 48.

The square root of 63994566 is about 7999.6603677906. The cubic root of 63994566 is about 399.9886788462.

The spelling of 63994566 in words is "sixty-three million, nine hundred ninety-four thousand, five hundred sixty-six".