65689678694 has 4 divisors (see below), whose sum is σ = 98534518044. Its totient is φ = 32844839346.

The previous prime is 65689678693. The next prime is 65689678697. The reversal of 65689678694 is 49687698656.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65689678693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16422419672 + ... + 16422419675.

It is an arithmetic number, because the mean of its divisors is an integer number (24633629511).

Almost surely, 2^65689678694 is an apocalyptic number.

65689678694 is a deficient number, since it is larger than the sum of its proper divisors (32844839350).

65689678694 is a wasteful number, since it uses less digits than its factorization.

65689678694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32844839349.

The product of its digits is 940584960, while the sum is 74.

The spelling of 65689678694 in words is "sixty-five billion, six hundred eighty-nine million, six hundred seventy-eight thousand, six hundred ninety-four".