65840568 has 32 divisors (see below), whose sum is σ = 168432000. Its totient is φ = 21436128.

The previous prime is 65840557. The next prime is 65840569. The reversal of 65840568 is 86504856.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65840569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30868 + ... + 32931.

It is an arithmetic number, because the mean of its divisors is an integer number (5263500).

Almost surely, 2^65840568 is an apocalyptic number.

It is an amenable number.

65840568 is an abundant number, since it is smaller than the sum of its proper divisors (102591432).

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

65840568 is a wasteful number, since it uses less digits than its factorization.

65840568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63851 (or 63847 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 42.

The square root of 65840568 is about 8114.2201103988. The cubic root of 65840568 is about 403.7983341446.

The spelling of 65840568 in words is "sixty-five million, eight hundred forty thousand, five hundred sixty-eight".