166006216 has 8 divisors (see below), whose sum is σ = 311261670. Its totient is φ = 83003104.

The previous prime is 166006201. The next prime is 166006219. The reversal of 166006216 is 612600661.

166006216 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 146168100 + 19838116 = 12090^2 + 4454^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (166006219) 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 as a sum of consecutive naturals, namely, 10375381 + ... + 10375396.

Almost surely, 2^166006216 is an apocalyptic number.

It is an amenable number.

166006216 is a deficient number, since it is larger than the sum of its proper divisors (145255454).

166006216 is a wasteful number, since it uses less digits than its factorization.

166006216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20750783 (or 20750779 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 166006216 is about 12884.3399520503. The cubic root of 166006216 is about 549.5933258224.

Adding to 166006216 its reverse (612600661), we get a palindrome (778606877).

The spelling of 166006216 in words is "one hundred sixty-six million, six thousand, two hundred sixteen".