65974939588249 has 4 divisors (see below), whose sum is σ = 66174259647760. Its totient is φ = 65775619528740.

The previous prime is 65974939588213. The next prime is 65974939588307. The reversal of 65974939588249 is 94288593947956.

It is a happy number.

65974939588249 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65974939588249 - 2¹⁷ = 65974939457177 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65974939588249.

It is not an unprimeable number, because it can be changed into a prime (65974939588849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99660029259 + ... + 99660029920.

It is an arithmetic number, because the mean of its divisors is an integer number (16543564911940).

Almost surely, 2^{65974939588249} is an apocalyptic number.

It is an amenable number.

65974939588249 is a deficient number, since it is larger than the sum of its proper divisors (199320059511).

65974939588249 is a wasteful number, since it uses less digits than its factorization.

65974939588249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199320059510.

The product of its digits is 42326323200, while the sum is 88.

The spelling of 65974939588249 in words is "sixty-five trillion, nine hundred seventy-four billion, nine hundred thirty-nine million, five hundred eighty-eight thousand, two hundred forty-nine".