63666716 has 12 divisors (see below), whose sum is σ = 115258920. Its totient is φ = 30735600.

The previous prime is 63666697. The next prime is 63666719. The reversal of 63666716 is 61766636.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63666719) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 274310 + ... + 274541.

It is an arithmetic number, because the mean of its divisors is an integer number (9604910).

Almost surely, 2^63666716 is an apocalyptic number.

It is an amenable number.

63666716 is a deficient number, since it is larger than the sum of its proper divisors (51592204).

63666716 is a wasteful number, since it uses less digits than its factorization.

63666716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548884 (or 548882 counting only the distinct ones).

The product of its digits is 163296, while the sum is 41.

The square root of 63666716 is about 7979.1425604510. The cubic root of 63666716 is about 399.3044495583.

The spelling of 63666716 in words is "sixty-three million, six hundred sixty-six thousand, seven hundred sixteen".