1166695489 has 2 divisors, whose sum is σ = 1166695490. Its totient is φ = 1166695488.

The previous prime is 1166695487. The next prime is 1166695529. The reversal of 1166695489 is 9845966611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1162264464 + 4431025 = 34092^2 + 2105^2 .

It is a cyclic number.

It is not a de Polignac number, because 1166695489 - 2¹ = 1166695487 is a prime.

It is a super-2 number, since 2×1166695489² = 2722356728105898242, which contains 22 as substring.

Together with 1166695487, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1166695487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 583347744 + 583347745.

It is an arithmetic number, because the mean of its divisors is an integer number (583347745).

Almost surely, 2^1166695489 is an apocalyptic number.

It is an amenable number.

1166695489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1166695489 is an equidigital number, since it uses as much as digits as its factorization.

1166695489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2799360, while the sum is 55.

The square root of 1166695489 is about 34156.9244663509. The cubic root of 1166695489 is about 1052.7352686914.

The spelling of 1166695489 in words is "one billion, one hundred sixty-six million, six hundred ninety-five thousand, four hundred eighty-nine".