65919944071 has 8 divisors (see below), whose sum is σ = 67000753664. Its totient is φ = 64847611800.

The previous prime is 65919944053. The next prime is 65919944087. The reversal of 65919944071 is 17044991956.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65919944071 - 2¹⁷ = 65919812999 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 (65919944371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2103651 + ... + 2134756.

It is an arithmetic number, because the mean of its divisors is an integer number (8375094208).

Almost surely, 2^65919944071 is an apocalyptic number.

65919944071 is a deficient number, since it is larger than the sum of its proper divisors (1080809593).

65919944071 is a wasteful number, since it uses less digits than its factorization.

65919944071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4238661.

The product of its (nonzero) digits is 2449440, while the sum is 55.

The spelling of 65919944071 in words is "sixty-five billion, nine hundred nineteen million, nine hundred forty-four thousand, seventy-one".