65739673841 has 4 divisors (see below), whose sum is σ = 65779349412. Its totient is φ = 65699998272.

The previous prime is 65739673823. The next prime is 65739673849. The reversal of 65739673841 is 14837693756.

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 12530563600 + 53209110241 = 111940^2 + 230671^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65739673841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65739673849) 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, 19835300 + ... + 19838613.

It is an arithmetic number, because the mean of its divisors is an integer number (16444837353).

Almost surely, 2^65739673841 is an apocalyptic number.

It is an amenable number.

65739673841 is a deficient number, since it is larger than the sum of its proper divisors (39675571).

65739673841 is a wasteful number, since it uses less digits than its factorization.

65739673841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39675570.

The product of its digits is 22861440, while the sum is 59.

The spelling of 65739673841 in words is "sixty-five billion, seven hundred thirty-nine million, six hundred seventy-three thousand, eight hundred forty-one".