65857676687 has 4 divisors (see below), whose sum is σ = 71844738216. Its totient is φ = 59870615160.

The previous prime is 65857676653. The next prime is 65857676707. The reversal of 65857676687 is 78667675856.

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 65857676687 - 2²⁶ = 65790567823 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 65857676687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65857676887) 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, 2993530748 + ... + 2993530769.

It is an arithmetic number, because the mean of its divisors is an integer number (17961184554).

Almost surely, 2^65857676687 is an apocalyptic number.

65857676687 is a deficient number, since it is larger than the sum of its proper divisors (5987061529).

65857676687 is a wasteful number, since it uses less digits than its factorization.

65857676687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5987061528.

The product of its digits is 711244800, while the sum is 71.

The spelling of 65857676687 in words is "sixty-five billion, eight hundred fifty-seven million, six hundred seventy-six thousand, six hundred eighty-seven".