66368716 has 12 divisors (see below), whose sum is σ = 117295920. Its totient is φ = 32855600.

The previous prime is 66368711. The next prime is 66368717. The reversal of 66368716 is 61786366.

It is not an unprimeable number, because it can be changed into a prime (66368711) 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, 81736 + ... + 82543.

It is an arithmetic number, because the mean of its divisors is an integer number (9774660).

Almost surely, 2^66368716 is an apocalyptic number.

It is an amenable number.

66368716 is a deficient number, since it is larger than the sum of its proper divisors (50927204).

66368716 is a wasteful number, since it uses less digits than its factorization.

66368716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164384 (or 164382 counting only the distinct ones).

The product of its digits is 217728, while the sum is 43.

The square root of 66368716 is about 8146.6996998785. The cubic root of 66368716 is about 404.8751655089.

The spelling of 66368716 in words is "sixty-six million, three hundred sixty-eight thousand, seven hundred sixteen".