80689868665 has 16 divisors (see below), whose sum is σ = 110839773312. Its totient is φ = 55240504704.

The previous prime is 80689868621. The next prime is 80689868681. The reversal of 80689868665 is 56686898608.

It is not a de Polignac number, because 80689868665 - 2⁹ = 80689868153 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 80689868594 and 80689868603.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1846659 + ... + 1889848.

It is an arithmetic number, because the mean of its divisors is an integer number (6927485832).

Almost surely, 2^80689868665 is an apocalyptic number.

It is an amenable number.

80689868665 is a deficient number, since it is larger than the sum of its proper divisors (30149904647).

80689868665 is a wasteful number, since it uses less digits than its factorization.

80689868665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3737136.

The product of its (nonzero) digits is 238878720, while the sum is 70.

The spelling of 80689868665 in words is "eighty billion, six hundred eighty-nine million, eight hundred sixty-eight thousand, six hundred sixty-five".