65013680 has 20 divisors (see below), whose sum is σ = 151156992. Its totient is φ = 26005440.

The previous prime is 65013673. The next prime is 65013701. The reversal of 65013680 is 8631056.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 406256 + ... + 406415.

Almost surely, 2^65013680 is an apocalyptic number.

It is an amenable number.

65013680 is an abundant number, since it is smaller than the sum of its proper divisors (86143312).

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

65013680 is a wasteful number, since it uses less digits than its factorization.

65013680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812684 (or 812678 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 65013680 is about 8063.1061012491. The cubic root of 65013680 is about 402.1007808179.

The spelling of 65013680 in words is "sixty-five million, thirteen thousand, six hundred eighty".