1166506443 has 12 divisors (see below), whose sum is σ = 1686058920. Its totient is φ = 777160896.

The previous prime is 1166506421. The next prime is 1166506483. The reversal of 1166506443 is 3446056611.

It is a happy number.

1166506443 is a `hidden beast` number, since 1 + 1 + 6 + 6 + 5 + 0 + 644 + 3 = 666.

It is not a de Polignac number, because 1166506443 - 2¹² = 1166502347 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1166506398 and 1166506407.

It is not an unprimeable number, because it can be changed into a prime (1166506483) 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 in 11 ways as a sum of consecutive naturals, for example, 27753 + ... + 55706.

It is an arithmetic number, because the mean of its divisors is an integer number (140504910).

Almost surely, 2^1166506443 is an apocalyptic number.

1166506443 is a deficient number, since it is larger than the sum of its proper divisors (519552477).

1166506443 is a wasteful number, since it uses less digits than its factorization.

1166506443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85018 (or 85015 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 1166506443 is about 34154.1570383460. The cubic root of 1166506443 is about 1052.6784054843.

The spelling of 1166506443 in words is "one billion, one hundred sixty-six million, five hundred six thousand, four hundred forty-three".