65684064 has 48 divisors (see below), whose sum is σ = 181500480. Its totient is φ = 20741760.

The previous prime is 65684063. The next prime is 65684081. The reversal of 65684064 is 46048656.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65684063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16182 + ... + 19829.

It is an arithmetic number, because the mean of its divisors is an integer number (3781260).

Almost surely, 2^65684064 is an apocalyptic number.

It is an amenable number.

65684064 is an abundant number, since it is smaller than the sum of its proper divisors (115816416).

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

65684064 is a wasteful number, since it uses less digits than its factorization.

65684064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36043 (or 36035 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 39.

The square root of 65684064 is about 8104.5705623432. The cubic root of 65684064 is about 403.4781354419.

The spelling of 65684064 in words is "sixty-five million, six hundred eighty-four thousand, sixty-four".