166245216 has 24 divisors (see below), whose sum is σ = 436393944. Its totient is φ = 55415040.

The previous prime is 166245199. The next prime is 166245217. The reversal of 166245216 is 612542661.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166245217) 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, 865765 + ... + 865956.

It is an arithmetic number, because the mean of its divisors is an integer number (18183081).

Almost surely, 2^166245216 is an apocalyptic number.

166245216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

166245216 is an abundant number, since it is smaller than the sum of its proper divisors (270148728).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166245216 is a wasteful number, since it uses less digits than its factorization.

166245216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1731734 (or 1731726 counting only the distinct ones).

The product of its digits is 17280, while the sum is 33.

The square root of 166245216 is about 12893.6114413302. The cubic root of 166245216 is about 549.8569501251.

Adding to 166245216 its reverse (612542661), we get a palindrome (778787877).

The spelling of 166245216 in words is "one hundred sixty-six million, two hundred forty-five thousand, two hundred sixteen".