166003115 has 4 divisors (see below), whose sum is σ = 199203744. Its totient is φ = 132802488.

The previous prime is 166003111. The next prime is 166003129. The reversal of 166003115 is 511300661.

It is a happy number.

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 166003115 - 2² = 166003111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166003111) 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 3 ways as a sum of consecutive naturals, for example, 16600307 + ... + 16600316.

It is an arithmetic number, because the mean of its divisors is an integer number (49800936).

Almost surely, 2^166003115 is an apocalyptic number.

166003115 is a deficient number, since it is larger than the sum of its proper divisors (33200629).

166003115 is an equidigital number, since it uses as much as digits as its factorization.

166003115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33200628.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 166003115 is about 12884.2196116024. The cubic root of 166003115 is about 549.5899036624.

Adding to 166003115 its reverse (511300661), we get a palindrome (677303776).

The spelling of 166003115 in words is "one hundred sixty-six million, three thousand, one hundred fifteen".