166500115 has 4 divisors (see below), whose sum is σ = 199800144. Its totient is φ = 133200088.

The previous prime is 166500109. The next prime is 166500119. The reversal of 166500115 is 511005661.

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

It is a cyclic number.

It is not a de Polignac number, because 166500115 - 2⁷ = 166499987 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166500115.

It is not an unprimeable number, because it can be changed into a prime (166500119) 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, 16650007 + ... + 16650016.

It is an arithmetic number, because the mean of its divisors is an integer number (49950036).

Almost surely, 2^166500115 is an apocalyptic number.

166500115 is a deficient number, since it is larger than the sum of its proper divisors (33300029).

166500115 is an equidigital number, since it uses as much as digits as its factorization.

166500115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33300028.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 166500115 is about 12903.4923567227. The cubic root of 166500115 is about 550.1378332239.

Adding to 166500115 its reverse (511005661), we get a palindrome (677505776).

The spelling of 166500115 in words is "one hundred sixty-six million, five hundred thousand, one hundred fifteen".