65994585129793 has 4 divisors (see below), whose sum is σ = 65994903486148. Its totient is φ = 65994266773440.

The previous prime is 65994585129701. The next prime is 65994585129833. The reversal of 65994585129793 is 39792158549956.

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 37576005025329 + 28418580104464 = 6129927^2 + 5330908^2 .

It is a cyclic number.

It is not a de Polignac number, because 65994585129793 - 2²⁹ = 65994048258881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65994585126793) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158867028 + ... + 159281893.

It is an arithmetic number, because the mean of its divisors is an integer number (16498725871537).

Almost surely, 2^{65994585129793} is an apocalyptic number.

It is an amenable number.

65994585129793 is a deficient number, since it is larger than the sum of its proper divisors (318356355).

65994585129793 is a wasteful number, since it uses less digits than its factorization.

65994585129793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318356354.

The product of its digits is 6613488000, while the sum is 82.

The spelling of 65994585129793 in words is "sixty-five trillion, nine hundred ninety-four billion, five hundred eighty-five million, one hundred twenty-nine thousand, seven hundred ninety-three".