166516375 has 16 divisors (see below), whose sum is σ = 212887584. Its totient is φ = 129960000.

The previous prime is 166516369. The next prime is 166516379. The reversal of 166516375 is 573615661.

It is not a de Polignac number, because 166516375 - 2¹⁵ = 166483607 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 (166516379) 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, 11121 + ... + 21370.

It is an arithmetic number, because the mean of its divisors is an integer number (13305474).

Almost surely, 2^166516375 is an apocalyptic number.

166516375 is a deficient number, since it is larger than the sum of its proper divisors (46371209).

166516375 is an equidigital number, since it uses as much as digits as its factorization.

166516375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32547 (or 32537 counting only the distinct ones).

The product of its digits is 113400, while the sum is 40.

The square root of 166516375 is about 12904.1224033252. The cubic root of 166516375 is about 550.1557410193.

The spelling of 166516375 in words is "one hundred sixty-six million, five hundred sixteen thousand, three hundred seventy-five".