65979980129 has 16 divisors (see below), whose sum is σ = 75819287808. Its totient is φ = 56244307392.

The previous prime is 65979980123. The next prime is 65979980153. The reversal of 65979980129 is 92108997956.

It is not a de Polignac number, because 65979980129 - 2¹⁶ = 65979914593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65979980123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3972887 + ... + 3989459.

It is an arithmetic number, because the mean of its divisors is an integer number (4738705488).

Almost surely, 2^65979980129 is an apocalyptic number.

It is an amenable number.

65979980129 is a deficient number, since it is larger than the sum of its proper divisors (9839307679).

65979980129 is a wasteful number, since it uses less digits than its factorization.

65979980129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19664.

The product of its (nonzero) digits is 22044960, while the sum is 65.

The spelling of 65979980129 in words is "sixty-five billion, nine hundred seventy-nine million, nine hundred eighty thousand, one hundred twenty-nine".