65681712 has 40 divisors (see below), whose sum is σ = 188532080. Its totient is φ = 21893760.

The previous prime is 65681711. The next prime is 65681743. The reversal of 65681712 is 21718656.

65681712 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (65681711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75589 + ... + 76452.

It is an arithmetic number, because the mean of its divisors is an integer number (4713302).

Almost surely, 2^65681712 is an apocalyptic number.

It is an amenable number.

65681712 is an abundant number, since it is smaller than the sum of its proper divisors (122850368).

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

65681712 is a wasteful number, since it uses less digits than its factorization.

65681712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152058 (or 152046 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 65681712 is about 8104.4254577360. The cubic root of 65681712 is about 403.4733195001.

The spelling of 65681712 in words is "sixty-five million, six hundred eighty-one thousand, seven hundred twelve".