87566311111 has 2 divisors, whose sum is σ = 87566311112. Its totient is φ = 87566311110.

The previous prime is 87566311069. The next prime is 87566311153. The reversal of 87566311111 is 11111366578.

It is a balanced prime because it is at equal distance from previous prime (87566311069) and next prime (87566311153).

It is a cyclic number.

It is not a de Polignac number, because 87566311111 - 2¹¹ = 87566309063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87566311181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43783155555 + 43783155556.

It is an arithmetic number, because the mean of its divisors is an integer number (43783155556).

Almost surely, 2^87566311111 is an apocalyptic number.

87566311111 is a deficient number, since it is larger than the sum of its proper divisors (1).

87566311111 is an equidigital number, since it uses as much as digits as its factorization.

87566311111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 40.

Adding to 87566311111 its reverse (11111366578), we get a palindrome (98677677689).

The spelling of 87566311111 in words is "eighty-seven billion, five hundred sixty-six million, three hundred eleven thousand, one hundred eleven".