80708665 has 8 divisors (see below), whose sum is σ = 98678088. Its totient is φ = 63348480.

The previous prime is 80708657. The next prime is 80708689. The reversal of 80708665 is 56680708.

It can be written as a sum of positive squares in 4 ways, for example, as 10601536 + 70107129 = 3256^2 + 8373^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 80708665 - 2³ = 80708657 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152016 + ... + 152545.

It is an arithmetic number, because the mean of its divisors is an integer number (12334761).

Almost surely, 2^80708665 is an apocalyptic number.

It is an amenable number.

80708665 is a deficient number, since it is larger than the sum of its proper divisors (17969423).

80708665 is a wasteful number, since it uses less digits than its factorization.

80708665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304619.

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 80708665 is about 8983.8001424787. The cubic root of 80708665 is about 432.1555099284.

The spelling of 80708665 in words is "eighty million, seven hundred eight thousand, six hundred sixty-five".