80786705 has 8 divisors (see below), whose sum is σ = 97562472. Its totient is φ = 64217088.

The previous prime is 80786701. The next prime is 80786707. The reversal of 80786705 is 50768708.

It can be written as a sum of positive squares in 4 ways, for example, as 92416 + 80694289 = 304^2 + 8983^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 80786705 - 2² = 80786701 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80786701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50672 + ... + 52241.

It is an arithmetic number, because the mean of its divisors is an integer number (12195309).

Almost surely, 2^80786705 is an apocalyptic number.

It is an amenable number.

80786705 is a deficient number, since it is larger than the sum of its proper divisors (16775767).

80786705 is a wasteful number, since it uses less digits than its factorization.

80786705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103075.

The product of its (nonzero) digits is 94080, while the sum is 41.

The square root of 80786705 is about 8988.1424666057. The cubic root of 80786705 is about 432.2947537619.

The spelling of 80786705 in words is "eighty million, seven hundred eighty-six thousand, seven hundred five".