65688812 has 36 divisors (see below), whose sum is σ = 134198064. Its totient is φ = 28052640.

The previous prime is 65688803. The next prime is 65688817. The reversal of 65688812 is 21888656.

It is not an unprimeable number, because it can be changed into a prime (65688817) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 89993 + ... + 90719.

It is an arithmetic number, because the mean of its divisors is an integer number (3727724).

Almost surely, 2^65688812 is an apocalyptic number.

It is an amenable number.

65688812 is an abundant number, since it is smaller than the sum of its proper divisors (68509252).

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

65688812 is a wasteful number, since it uses less digits than its factorization.

65688812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1206 (or 1197 counting only the distinct ones).

The product of its digits is 184320, while the sum is 44.

The square root of 65688812 is about 8104.8634781839. The cubic root of 65688812 is about 403.4878570695.

The spelling of 65688812 in words is "sixty-five million, six hundred eighty-eight thousand, eight hundred twelve".