80711766 has 24 divisors (see below), whose sum is σ = 175893120. Its totient is φ = 26747376.

The previous prime is 80711749. The next prime is 80711777. The reversal of 80711766 is 66711708.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 80711766.

It is a congruent 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 11 ways as a sum of consecutive naturals, for example, 9846 + ... + 16073.

It is an arithmetic number, because the mean of its divisors is an integer number (7328880).

Almost surely, 2^80711766 is an apocalyptic number.

80711766 is an abundant number, since it is smaller than the sum of its proper divisors (95181354).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80711766 is a wasteful number, since it uses less digits than its factorization.

80711766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26100 (or 26097 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 80711766 is about 8983.9727292551. The cubic root of 80711766 is about 432.1610446380.

The spelling of 80711766 in words is "eighty million, seven hundred eleven thousand, seven hundred sixty-six".