65555840065 has 8 divisors (see below), whose sum is σ = 78775220160. Its totient is φ = 52372530672.

The previous prime is 65555840041. The next prime is 65555840149. The reversal of 65555840065 is 56004855556.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65555840065 - 2⁵ = 65555840033 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9013675 + ... + 9020944.

It is an arithmetic number, because the mean of its divisors is an integer number (9846902520).

Almost surely, 2^65555840065 is an apocalyptic number.

It is an amenable number.

65555840065 is a deficient number, since it is larger than the sum of its proper divisors (13219380095).

65555840065 is a wasteful number, since it uses less digits than its factorization.

65555840065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18035351.

The product of its (nonzero) digits is 3600000, while the sum is 49.

The spelling of 65555840065 in words is "sixty-five billion, five hundred fifty-five million, eight hundred forty thousand, sixty-five".