1166302405891 has 8 divisors (see below), whose sum is σ = 1332964217600. Its totient is φ = 999652389768.

The previous prime is 1166302405883. The next prime is 1166302405913. The reversal of 1166302405891 is 1985042036611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1166302405891 - 2³ = 1166302405883 is a prime.

It is a super-2 number, since 2×1166302405891² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1166302406891) 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 7 ways as a sum of consecutive naturals, for example, 2735991 + ... + 3133408.

It is an arithmetic number, because the mean of its divisors is an integer number (166620527200).

Almost surely, 2^{1166302405891} is an apocalyptic number.

1166302405891 is a deficient number, since it is larger than the sum of its proper divisors (166661811709).

1166302405891 is an equidigital number, since it uses as much as digits as its factorization.

1166302405891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5897793.

The product of its (nonzero) digits is 311040, while the sum is 46.

The spelling of 1166302405891 in words is "one trillion, one hundred sixty-six billion, three hundred two million, four hundred five thousand, eight hundred ninety-one".