65755376639 has 4 divisors (see below), whose sum is σ = 65778705240. Its totient is φ = 65732048040.

The previous prime is 65755376597. The next prime is 65755376641. The reversal of 65755376639 is 93667355756.

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 65755376639 - 2⁸ = 65755376383 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 (65755376699) 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, 11660072 + ... + 11665709.

It is an arithmetic number, because the mean of its divisors is an integer number (16444676310).

Almost surely, 2^65755376639 is an apocalyptic number.

65755376639 is a deficient number, since it is larger than the sum of its proper divisors (23328601).

65755376639 is a wasteful number, since it uses less digits than its factorization.

65755376639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23328600.

The product of its digits is 107163000, while the sum is 62.

The spelling of 65755376639 in words is "sixty-five billion, seven hundred fifty-five million, three hundred seventy-six thousand, six hundred thirty-nine".