80705711 has 16 divisors (see below), whose sum is σ = 87584640. Its totient is φ = 74118240.

The previous prime is 80705683. The next prime is 80705717. The reversal of 80705711 is 11750708.

It is a de Polignac number, because none of the positive numbers 2^k-80705711 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 (80705717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141056 + ... + 141626.

It is an arithmetic number, because the mean of its divisors is an integer number (5474040).

Almost surely, 2^80705711 is an apocalyptic number.

80705711 is a deficient number, since it is larger than the sum of its proper divisors (6878929).

80705711 is a wasteful number, since it uses less digits than its factorization.

80705711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806.

The product of its (nonzero) digits is 1960, while the sum is 29.

The square root of 80705711 is about 8983.6357339331. The cubic root of 80705711 is about 432.1502374547.

The spelling of 80705711 in words is "eighty million, seven hundred five thousand, seven hundred eleven".