1166915263 has 4 divisors (see below), whose sum is σ = 1166989888. Its totient is φ = 1166840640.

The previous prime is 1166915231. The next prime is 1166915279. The reversal of 1166915263 is 3625196611.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1166915263 - 2⁵ = 1166915231 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 (1166915203) 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, 3858 + ... + 48463.

It is an arithmetic number, because the mean of its divisors is an integer number (291747472).

Almost surely, 2^1166915263 is an apocalyptic number.

1166915263 is a deficient number, since it is larger than the sum of its proper divisors (74625).

1166915263 is an equidigital number, since it uses as much as digits as its factorization.

1166915263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74624.

The product of its digits is 58320, while the sum is 40.

The square root of 1166915263 is about 34160.1414370608. The cubic root of 1166915263 is about 1052.8013668627.

The spelling of 1166915263 in words is "one billion, one hundred sixty-six million, nine hundred fifteen thousand, two hundred sixty-three".