65689337979 has 24 divisors (see below), whose sum is σ = 99022603680. Its totient is φ = 41883528192.

The previous prime is 65689337971. The next prime is 65689337999. The reversal of 65689337979 is 97973398656.

It is not a de Polignac number, because 65689337979 - 2³ = 65689337971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65689337971) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2201947 + ... + 2231579.

It is an arithmetic number, because the mean of its divisors is an integer number (4125941820).

Almost surely, 2^65689337979 is an apocalyptic number.

65689337979 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

65689337979 is a deficient number, since it is larger than the sum of its proper divisors (33333265701).

65689337979 is a wasteful number, since it uses less digits than its factorization.

65689337979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40371 (or 40368 counting only the distinct ones).

The product of its digits is 462944160, while the sum is 72.

The spelling of 65689337979 in words is "sixty-five billion, six hundred eighty-nine million, three hundred thirty-seven thousand, nine hundred seventy-nine".