115666005 has 32 divisors (see below), whose sum is σ = 227775744. Its totient is φ = 48807936.

The previous prime is 115666003. The next prime is 115666021. The reversal of 115666005 is 500666511.

It is not a de Polignac number, because 115666005 - 2¹ = 115666003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115666003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41004 + ... + 43733.

It is an arithmetic number, because the mean of its divisors is an integer number (7117992).

Almost surely, 2^115666005 is an apocalyptic number.

115666005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

115666005 is a deficient number, since it is larger than the sum of its proper divisors (112109739).

115666005 is a wasteful number, since it uses less digits than its factorization.

115666005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84765.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 115666005 is about 10754.8131085575. The cubic root of 115666005 is about 487.2313733737.

It can be divided in two parts, 11566 and 6005, that added together give a palindrome (17571).

The spelling of 115666005 in words is "one hundred fifteen million, six hundred sixty-six thousand, five".