1666666711 has 2 divisors, whose sum is σ = 1666666712. Its totient is φ = 1666666710.

The previous prime is 1666666693. The next prime is 1666666753. The reversal of 1666666711 is 1176666661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1666666711 - 2⁵ = 1666666679 is a prime.

It is a super-4 number, since 4×1666666711⁴ (a number of 38 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1666646711) 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 as a sum of consecutive naturals, namely, 833333355 + 833333356.

It is an arithmetic number, because the mean of its divisors is an integer number (833333356).

Almost surely, 2^1666666711 is an apocalyptic number.

1666666711 is a deficient number, since it is larger than the sum of its proper divisors (1).

1666666711 is an equidigital number, since it uses as much as digits as its factorization.

1666666711 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 46.

The square root of 1666666711 is about 40824.8295893565. The cubic root of 1666666711 is about 1185.6311120093.

The spelling of 1666666711 in words is "one billion, six hundred sixty-six million, six hundred sixty-six thousand, seven hundred eleven".