80665159 has 4 divisors (see below), whose sum is σ = 81801360. Its totient is φ = 79528960.

The previous prime is 80665157. The next prime is 80665181. The reversal of 80665159 is 95156608.

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 80665159 - 2¹ = 80665157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80665157) 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, 567994 + ... + 568135.

It is an arithmetic number, because the mean of its divisors is an integer number (20450340).

Almost surely, 2^80665159 is an apocalyptic number.

80665159 is a deficient number, since it is larger than the sum of its proper divisors (1136201).

80665159 is a wasteful number, since it uses less digits than its factorization.

80665159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1136200.

The product of its (nonzero) digits is 64800, while the sum is 40.

The square root of 80665159 is about 8981.3784576756. The cubic root of 80665159 is about 432.0778448395.

It can be divided in two parts, 8066 and 5159, that added together give a square (13225 = 115²).

The spelling of 80665159 in words is "eighty million, six hundred sixty-five thousand, one hundred fifty-nine".