1166689669 has 2 divisors, whose sum is σ = 1166689670. Its totient is φ = 1166689668.

The previous prime is 1166689649. The next prime is 1166689703. The reversal of 1166689669 is 9669866611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1163696769 + 2992900 = 34113^2 + 1730^2 .

It is a cyclic number.

It is not a de Polignac number, because 1166689669 - 2⁵ = 1166689637 is a prime.

It is a super-2 number, since 2×1166689669² = 2722329567502659122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1166689639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 583344834 + 583344835.

It is an arithmetic number, because the mean of its divisors is an integer number (583344835).

Almost surely, 2^1166689669 is an apocalyptic number.

It is an amenable number.

1166689669 is a deficient number, since it is larger than the sum of its proper divisors (1).

1166689669 is an equidigital number, since it uses as much as digits as its factorization.

1166689669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5038848, while the sum is 58.

The square root of 1166689669 is about 34156.8392712206. The cubic root of 1166689669 is about 1052.7335181834.

The spelling of 1166689669 in words is "one billion, one hundred sixty-six million, six hundred eighty-nine thousand, six hundred sixty-nine".