1166666771 has 2 divisors, whose sum is σ = 1166666772. Its totient is φ = 1166666770.

The previous prime is 1166666731. The next prime is 1166666791. The reversal of 1166666771 is 1776666611.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1166666771 is a prime.

It is a super-2 number, since 2×1166666771² = 2722222709111132882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1166666731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 583333385 + 583333386.

It is an arithmetic number, because the mean of its divisors is an integer number (583333386).

Almost surely, 2^1166666771 is an apocalyptic number.

1166666771 is a deficient number, since it is larger than the sum of its proper divisors (1).

1166666771 is an equidigital number, since it uses as much as digits as its factorization.

1166666771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024, while the sum is 47.

The square root of 1166666771 is about 34156.5040804822. The cubic root of 1166666771 is about 1052.7266309907.

The spelling of 1166666771 in words is "one billion, one hundred sixty-six million, six hundred sixty-six thousand, seven hundred seventy-one".