63986166 has 32 divisors (see below), whose sum is σ = 142497120. Its totient is φ = 21282912.

The previous prime is 63986159. The next prime is 63986171. The reversal of 63986166 is 66168936.

63986166 is a `hidden beast` number, since 639 + 8 + 6 + 1 + 6 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32136 + ... + 34068.

It is an arithmetic number, because the mean of its divisors is an integer number (4453035).

Almost surely, 2^63986166 is an apocalyptic number.

63986166 is an abundant number, since it is smaller than the sum of its proper divisors (78510954).

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

63986166 is a wasteful number, since it uses less digits than its factorization.

63986166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2557 (or 2551 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 63986166 is about 7999.1353282714. The cubic root of 63986166 is about 399.9711770898.

The spelling of 63986166 in words is "sixty-three million, nine hundred eighty-six thousand, one hundred sixty-six".