1166111115 has 32 divisors (see below), whose sum is σ = 2013984000. Its totient is φ = 572747136.

The previous prime is 1166111087. The next prime is 1166111119. The reversal of 1166111115 is 5111116611.

It is not a de Polignac number, because 1166111115 - 2⁸ = 1166110859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1166111119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79636 + ... + 93134.

It is an arithmetic number, because the mean of its divisors is an integer number (62937000).

Almost surely, 2^1166111115 is an apocalyptic number.

1166111115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1166111115 is a deficient number, since it is larger than the sum of its proper divisors (847872885).

1166111115 is a wasteful number, since it uses less digits than its factorization.

1166111115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13963.

The product of its digits is 180, while the sum is 24.

The square root of 1166111115 is about 34148.3691411464. The cubic root of 1166111115 is about 1052.5594747885.

Adding to 1166111115 its reverse (5111116611), we get a palindrome (6277227726).

The spelling of 1166111115 in words is "one billion, one hundred sixty-six million, one hundred eleven thousand, one hundred fifteen".