166120216 has 8 divisors (see below), whose sum is σ = 311475420. Its totient is φ = 83060104.

The previous prime is 166120193. The next prime is 166120217. The reversal of 166120216 is 612021661.

166120216 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166120217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10382506 + ... + 10382521.

Almost surely, 2^166120216 is an apocalyptic number.

It is an amenable number.

166120216 is a deficient number, since it is larger than the sum of its proper divisors (145355204).

166120216 is a wasteful number, since it uses less digits than its factorization.

166120216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20765033 (or 20765029 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 166120216 is about 12888.7631679692. The cubic root of 166120216 is about 549.7191028450.

Adding to 166120216 its reverse (612021661), we get a palindrome (778141877).

The spelling of 166120216 in words is "one hundred sixty-six million, one hundred twenty thousand, two hundred sixteen".