1166400506441 has 4 divisors (see below), whose sum is σ = 1227790006800. Its totient is φ = 1105011006084.

The previous prime is 1166400506423. The next prime is 1166400506443. The reversal of 1166400506441 is 1446050046611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1166400506441 - 2⁶ = 1166400506377 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1166400506395 and 1166400506404.

It is not an unprimeable number, because it can be changed into a prime (1166400506443) 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, 30694750151 + ... + 30694750188.

It is an arithmetic number, because the mean of its divisors is an integer number (306947501700).

Almost surely, 2^{1166400506441} is an apocalyptic number.

It is an amenable number.

1166400506441 is a deficient number, since it is larger than the sum of its proper divisors (61389500359).

1166400506441 is an equidigital number, since it uses as much as digits as its factorization.

1166400506441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61389500358.

The product of its (nonzero) digits is 69120, while the sum is 38.

The spelling of 1166400506441 in words is "one trillion, one hundred sixty-six billion, four hundred million, five hundred six thousand, four hundred forty-one".