166020212 has 6 divisors (see below), whose sum is σ = 290535378. Its totient is φ = 83010104.

The previous prime is 166020203. The next prime is 166020229. The reversal of 166020212 is 212020661.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 97693456 + 68326756 = 9884^2 + 8266^2 .

It is a congruent 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, 20752523 + ... + 20752530.

It is an arithmetic number, because the mean of its divisors is an integer number (48422563).

Almost surely, 2^166020212 is an apocalyptic number.

It is an amenable number.

166020212 is a deficient number, since it is larger than the sum of its proper divisors (124515166).

166020212 is a wasteful number, since it uses less digits than its factorization.

166020212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41505057 (or 41505055 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 166020212 is about 12884.8830805716. The cubic root of 166020212 is about 549.6087708104.

Adding to 166020212 its reverse (212020661), we get a palindrome (378040873).

The spelling of 166020212 in words is "one hundred sixty-six million, twenty thousand, two hundred twelve".