80711777 has 2 divisors, whose sum is σ = 80711778. Its totient is φ = 80711776.

The previous prime is 80711749. The next prime is 80711789. The reversal of 80711777 is 77711708.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53348416 + 27363361 = 7304^2 + 5231^2 .

It is a cyclic number.

It is not a de Polignac number, because 80711777 - 2¹⁰ = 80710753 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80711777.

It is not a weakly prime, because it can be changed into another prime (80711707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40355888 + 40355889.

It is an arithmetic number, because the mean of its divisors is an integer number (40355889).

Almost surely, 2^80711777 is an apocalyptic number.

It is an amenable number.

80711777 is a deficient number, since it is larger than the sum of its proper divisors (1).

80711777 is an equidigital number, since it uses as much as digits as its factorization.

80711777 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19208, while the sum is 38.

The square root of 80711777 is about 8983.9733414564. The cubic root of 80711777 is about 432.1610642707.

The spelling of 80711777 in words is "eighty million, seven hundred eleven thousand, seven hundred seventy-seven".