63806866 has 16 divisors (see below), whose sum is σ = 99475200. Its totient is φ = 30662640.

The previous prime is 63806861. The next prime is 63806867. The reversal of 63806866 is 66860836.

It is a super-3 number, since 3×63806866³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (63806861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5785 + ... + 12691.

It is an arithmetic number, because the mean of its divisors is an integer number (6217200).

Almost surely, 2^63806866 is an apocalyptic number.

63806866 is a deficient number, since it is larger than the sum of its proper divisors (35668334).

63806866 is a wasteful number, since it uses less digits than its factorization.

63806866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7089.

The product of its (nonzero) digits is 248832, while the sum is 43.

The square root of 63806866 is about 7987.9200046070. The cubic root of 63806866 is about 399.5972320811.

The spelling of 63806866 in words is "sixty-three million, eight hundred six thousand, eight hundred sixty-six".