166515212 has 6 divisors (see below), whose sum is σ = 291401628. Its totient is φ = 83257604.

The previous prime is 166515197. The next prime is 166515233. The reversal of 166515212 is 212515661.

It is a happy number.

It is an unprimeable number.

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, 20814398 + ... + 20814405.

It is an arithmetic number, because the mean of its divisors is an integer number (48566938).

Almost surely, 2^166515212 is an apocalyptic number.

It is an amenable number.

166515212 is a deficient number, since it is larger than the sum of its proper divisors (124886416).

166515212 is a wasteful number, since it uses less digits than its factorization.

166515212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41628807 (or 41628805 counting only the distinct ones).

The product of its digits is 3600, while the sum is 29.

The square root of 166515212 is about 12904.0773401278. The cubic root of 166515212 is about 550.1544601991.

The spelling of 166515212 in words is "one hundred sixty-six million, five hundred fifteen thousand, two hundred twelve".