166216012 has 24 divisors (see below), whose sum is σ = 296110080. Its totient is φ = 81620880.

The previous prime is 166215997. The next prime is 166216019. The reversal of 166216012 is 210612661.

It is not an unprimeable number, because it can be changed into a prime (166216019) 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 7 ways as a sum of consecutive naturals, for example, 114789 + ... + 116227.

It is an arithmetic number, because the mean of its divisors is an integer number (12337920).

Almost surely, 2^166216012 is an apocalyptic number.

It is an amenable number.

166216012 is a deficient number, since it is larger than the sum of its proper divisors (129894068).

166216012 is a wasteful number, since it uses less digits than its factorization.

166216012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1941 (or 1939 counting only the distinct ones).

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

The square root of 166216012 is about 12892.4788927498. The cubic root of 166216012 is about 549.8247507770.

Adding to 166216012 its reverse (210612661), we get a palindrome (376828673).

The spelling of 166216012 in words is "one hundred sixty-six million, two hundred sixteen thousand, twelve".