166311199 has 16 divisors (see below), whose sum is σ = 177971200. Its totient is φ = 154967904.

The previous prime is 166311163. The next prime is 166311209. The reversal of 166311199 is 991113661.

It is a cyclic number.

It is not a de Polignac number, because 166311199 - 2⁹ = 166310687 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 (166311109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 378622 + ... + 379060.

It is an arithmetic number, because the mean of its divisors is an integer number (11123200).

Almost surely, 2^166311199 is an apocalyptic number.

166311199 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

166311199 is a deficient number, since it is larger than the sum of its proper divisors (11660001).

166311199 is a wasteful number, since it uses less digits than its factorization.

166311199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742.

The product of its digits is 8748, while the sum is 37.

The square root of 166311199 is about 12896.1699352947. The cubic root of 166311199 is about 549.9296868792.

The spelling of 166311199 in words is "one hundred sixty-six million, three hundred eleven thousand, one hundred ninety-nine".