166205216 has 24 divisors (see below), whose sum is σ = 327875184. Its totient is φ = 82935360.

The previous prime is 166205213. The next prime is 166205227. The reversal of 166205216 is 612502661.

It is not an unprimeable number, because it can be changed into a prime (166205213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11771 + ... + 21701.

It is an arithmetic number, because the mean of its divisors is an integer number (13661466).

Almost surely, 2^166205216 is an apocalyptic number.

166205216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

166205216 is a deficient number, since it is larger than the sum of its proper divisors (161669968).

166205216 is an equidigital number, since it uses as much as digits as its factorization.

166205216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10464 (or 10456 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 166205216 is about 12892.0601922268. The cubic root of 166205216 is about 549.8128465156.

Adding to 166205216 its reverse (612502661), we get a palindrome (778707877).

The spelling of 166205216 in words is "one hundred sixty-six million, two hundred five thousand, two hundred sixteen".