8666111977 has 2 divisors, whose sum is σ = 8666111978. Its totient is φ = 8666111976.

The previous prime is 8666111939. The next prime is 8666112001. The reversal of 8666111977 is 7791116668.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6969578256 + 1696533721 = 83484^2 + 41189^2 .

It is a cyclic number.

It is not a de Polignac number, because 8666111977 - 2⁷ = 8666111849 is a prime.

It is not a weakly prime, because it can be changed into another prime (8666112977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4333055988 + 4333055989.

It is an arithmetic number, because the mean of its divisors is an integer number (4333055989).

Almost surely, 2^8666111977 is an apocalyptic number.

It is an amenable number.

8666111977 is a deficient number, since it is larger than the sum of its proper divisors (1).

8666111977 is an equidigital number, since it uses as much as digits as its factorization.

8666111977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 762048, while the sum is 52.

The square root of 8666111977 is about 93091.9544160504. The cubic root of 8666111977 is about 2054.0362261233.

The spelling of 8666111977 in words is "eight billion, six hundred sixty-six million, one hundred eleven thousand, nine hundred seventy-seven".