65933965439 has 4 divisors (see below), whose sum is σ = 66586777080. Its totient is φ = 65281153800.

The previous prime is 65933965423. The next prime is 65933965453. The reversal of 65933965439 is 93456933956.

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 65933965439 - 2⁴ = 65933965423 is a prime.

It is a super-2 number, since 2×65933965439² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65939965439) 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, 326405669 + ... + 326405870.

It is an arithmetic number, because the mean of its divisors is an integer number (16646694270).

Almost surely, 2^65933965439 is an apocalyptic number.

65933965439 is a deficient number, since it is larger than the sum of its proper divisors (652811641).

65933965439 is a wasteful number, since it uses less digits than its factorization.

65933965439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652811640.

The product of its digits is 70858800, while the sum is 62.

The spelling of 65933965439 in words is "sixty-five billion, nine hundred thirty-three million, nine hundred sixty-five thousand, four hundred thirty-nine".