65703681 has 6 divisors (see below), whose sum is σ = 94905330. Its totient is φ = 43802448.

The previous prime is 65703667. The next prime is 65703683. The reversal of 65703681 is 18630756.

65703681 is a `hidden beast` number, since 6 + 570 + 3 + 6 + 81 = 666.

65703681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 35892081 + 29811600 = 5991^2 + 5460^2 .

It is not a de Polignac number, because 65703681 - 2⁷ = 65703553 is a prime.

It is a super-3 number, since 3×65703681³ (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 (65703683) 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 5 ways as a sum of consecutive naturals, for example, 3650196 + ... + 3650213.

It is an arithmetic number, because the mean of its divisors is an integer number (15817555).

Almost surely, 2^65703681 is an apocalyptic number.

It is an amenable number.

65703681 is a deficient number, since it is larger than the sum of its proper divisors (29201649).

65703681 is a wasteful number, since it uses less digits than its factorization.

65703681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7300415 (or 7300412 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 65703681 is about 8105.7807150206. The cubic root of 65703681 is about 403.5182986224.

The spelling of 65703681 in words is "sixty-five million, seven hundred three thousand, six hundred eighty-one".