65941970599 has 4 divisors (see below), whose sum is σ = 69820910064. Its totient is φ = 62063031136.

The previous prime is 65941970581. The next prime is 65941970609. The reversal of 65941970599 is 99507914956.

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 65941970599 - 2¹¹ = 65941968551 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 65941970599.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65941970569) 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, 1939469707 + ... + 1939469740.

It is an arithmetic number, because the mean of its divisors is an integer number (17455227516).

Almost surely, 2^65941970599 is an apocalyptic number.

65941970599 is a deficient number, since it is larger than the sum of its proper divisors (3878939465).

65941970599 is a wasteful number, since it uses less digits than its factorization.

65941970599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3878939464.

The product of its (nonzero) digits is 27556200, while the sum is 64.

The spelling of 65941970599 in words is "sixty-five billion, nine hundred forty-one million, nine hundred seventy thousand, five hundred ninety-nine".