65836640 has 24 divisors (see below), whose sum is σ = 155539440. Its totient is φ = 26334592.

The previous prime is 65836637. The next prime is 65836669. The reversal of 65836640 is 4663856.

65836640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 65836594 and 65836603.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 205580 + ... + 205899.

It is an arithmetic number, because the mean of its divisors is an integer number (6480810).

Almost surely, 2^65836640 is an apocalyptic number.

It is an amenable number.

65836640 is an abundant number, since it is smaller than the sum of its proper divisors (89702800).

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

65836640 is a wasteful number, since it uses less digits than its factorization.

65836640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411494 (or 411486 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 38.

The square root of 65836640 is about 8113.9780625782. The cubic root of 65836640 is about 403.7903038807.

The spelling of 65836640 in words is "sixty-five million, eight hundred thirty-six thousand, six hundred forty".