1166695531 has 2 divisors, whose sum is σ = 1166695532. Its totient is φ = 1166695530.

The previous prime is 1166695529. The next prime is 1166695547. The reversal of 1166695531 is 1355966611.

It is a weak prime.

It is an emirp because it is prime and its reverse (1355966611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1166695531 - 2¹ = 1166695529 is a prime.

It is a super-2 number, since 2×1166695531² = 2722356924110743922, which contains 22 as substring.

Together with 1166695529, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1166695591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 583347765 + 583347766.

It is an arithmetic number, because the mean of its divisors is an integer number (583347766).

Almost surely, 2^1166695531 is an apocalyptic number.

1166695531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1166695531 is an equidigital number, since it uses as much as digits as its factorization.

1166695531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145800, while the sum is 43.

The square root of 1166695531 is about 34156.9250811603. The cubic root of 1166695531 is about 1052.7352813239.

The spelling of 1166695531 in words is "one billion, one hundred sixty-six million, six hundred ninety-five thousand, five hundred thirty-one".