166021852 has 6 divisors (see below), whose sum is σ = 290538248. Its totient is φ = 83010924.

The previous prime is 166021841. The next prime is 166021853. The reversal of 166021852 is 258120661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166021853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20752728 + ... + 20752735.

Almost surely, 2^166021852 is an apocalyptic number.

It is an amenable number.

166021852 is a deficient number, since it is larger than the sum of its proper divisors (124516396).

166021852 is a wasteful number, since it uses less digits than its factorization.

166021852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41505467 (or 41505465 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 166021852 is about 12884.9467208832. The cubic root of 166021852 is about 549.6105805407.

The spelling of 166021852 in words is "one hundred sixty-six million, twenty-one thousand, eight hundred fifty-two".