80340665 has 4 divisors (see below), whose sum is σ = 96408804. Its totient is φ = 64272528.

The previous prime is 80340647. The next prime is 80340671. The reversal of 80340665 is 56604308.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 48846121 + 31494544 = 6989^2 + 5612^2 .

It is a cyclic number.

It is not a de Polignac number, because 80340665 - 2⁸ = 80340409 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8034062 + ... + 8034071.

It is an arithmetic number, because the mean of its divisors is an integer number (24102201).

Almost surely, 2^80340665 is an apocalyptic number.

It is an amenable number.

80340665 is a deficient number, since it is larger than the sum of its proper divisors (16068139).

80340665 is a wasteful number, since it uses less digits than its factorization.

80340665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16068138.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 80340665 is about 8963.2954319268. The cubic root of 80340665 is about 431.4976889802.

The spelling of 80340665 in words is "eighty million, three hundred forty thousand, six hundred sixty-five".