65500790605 has 4 divisors (see below), whose sum is σ = 78600948732. Its totient is φ = 52400632480.

The previous prime is 65500790591. The next prime is 65500790617. The reversal of 65500790605 is 50609700556.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18301490089 + 47199300516 = 135283^2 + 217254^2 .

It is not a de Polignac number, because 65500790605 - 2⁵ = 65500790573 is a prime.

It is a Duffinian number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 6550079056 + ... + 6550079065.

It is an arithmetic number, because the mean of its divisors is an integer number (19650237183).

Almost surely, 2^65500790605 is an apocalyptic number.

It is an amenable number.

65500790605 is a deficient number, since it is larger than the sum of its proper divisors (13100158127).

65500790605 is a wasteful number, since it uses less digits than its factorization.

65500790605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13100158126.

The product of its (nonzero) digits is 283500, while the sum is 43.

The spelling of 65500790605 in words is "sixty-five billion, five hundred million, seven hundred ninety thousand, six hundred five".