1166566453 has 4 divisors (see below), whose sum is σ = 1256302348. Its totient is φ = 1076830560.

The previous prime is 1166566421. The next prime is 1166566477. The reversal of 1166566453 is 3546656611.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 58874929 + 1107691524 = 7673^2 + 33282^2 .

It is not a de Polignac number, because 1166566453 - 2⁵ = 1166566421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166560453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44867928 + ... + 44867953.

It is an arithmetic number, because the mean of its divisors is an integer number (314075587).

Almost surely, 2^1166566453 is an apocalyptic number.

1166566453 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1166566453 is a deficient number, since it is larger than the sum of its proper divisors (89735895).

1166566453 is an equidigital number, since it uses as much as digits as its factorization.

1166566453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89735894.

The product of its digits is 388800, while the sum is 43.

The square root of 1166566453 is about 34155.0355438257. The cubic root of 1166566453 is about 1052.6964565770.

The spelling of 1166566453 in words is "one billion, one hundred sixty-six million, five hundred sixty-six thousand, four hundred fifty-three".