1166606263 has 4 divisors (see below), whose sum is σ = 1198136200. Its totient is φ = 1135076328.

The previous prime is 1166606239. The next prime is 1166606279. The reversal of 1166606263 is 3626066611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3626066611 = 107 ⋅33888473.

It is a cyclic number.

It is not a de Polignac number, because 1166606263 - 2⁹ = 1166605751 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 31529899 = 1166606263 / (1 + 1 + 6 + 6 + 6 + 0 + 6 + 2 + 6 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166606563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15764913 + ... + 15764986.

It is an arithmetic number, because the mean of its divisors is an integer number (299534050).

Almost surely, 2^1166606263 is an apocalyptic number.

1166606263 is a deficient number, since it is larger than the sum of its proper divisors (31529937).

1166606263 is an equidigital number, since it uses as much as digits as its factorization.

1166606263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31529936.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 1166606263 is about 34155.6183226128. The cubic root of 1166606263 is about 1052.7084311397.

The spelling of 1166606263 in words is "one billion, one hundred sixty-six million, six hundred six thousand, two hundred sixty-three".