1166341553 has 4 divisors (see below), whose sum is σ = 1256060148. Its totient is φ = 1076622960.

The previous prime is 1166341549. The next prime is 1166341567. The reversal of 1166341553 is 3551436611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3551436611 = 56239 ⋅63149.

It can be written as a sum of positive squares in 2 ways, for example, as 528678049 + 637663504 = 22993^2 + 25252^2 .

It is a cyclic number.

It is not a de Polignac number, because 1166341553 - 2² = 1166341549 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1166341573) 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, 44859278 + ... + 44859303.

It is an arithmetic number, because the mean of its divisors is an integer number (314015037).

Almost surely, 2^1166341553 is an apocalyptic number.

1166341553 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1166341553 is a deficient number, since it is larger than the sum of its proper divisors (89718595).

1166341553 is an equidigital number, since it uses as much as digits as its factorization.

1166341553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89718594.

The product of its digits is 32400, while the sum is 35.

The square root of 1166341553 is about 34151.7430448286. The cubic root of 1166341553 is about 1052.6288031518.

The spelling of 1166341553 in words is "one billion, one hundred sixty-six million, three hundred forty-one thousand, five hundred fifty-three".