65967403985279 has 4 divisors (see below), whose sum is σ = 66302263904184. Its totient is φ = 65632544066376.

The previous prime is 65967403985209. The next prime is 65967403985297. The reversal of 65967403985279 is 97258930476956.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 65967403985279 - 2²⁸ = 65967135549823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65967403985209) 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, 167429959157 + ... + 167429959550.

It is an arithmetic number, because the mean of its divisors is an integer number (16575565976046).

Almost surely, 2^{65967403985279} is an apocalyptic number.

65967403985279 is a deficient number, since it is larger than the sum of its proper divisors (334859918905).

65967403985279 is a wasteful number, since it uses less digits than its factorization.

65967403985279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334859918904.

The product of its (nonzero) digits is 6172588800, while the sum is 80.

The spelling of 65967403985279 in words is "sixty-five trillion, nine hundred sixty-seven billion, four hundred three million, nine hundred eighty-five thousand, two hundred seventy-nine".