166201636 has 12 divisors (see below), whose sum is σ = 290993500. Its totient is φ = 83060640.

The previous prime is 166201631. The next prime is 166201681. The reversal of 166201636 is 636102661.

166201636 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 51840000 + 114361636 = 7200^2 + 10694^2 .

It is a junction number, because it is equal to n+sod(n) for n = 166201598 and 166201607.

It is not an unprimeable number, because it can be changed into a prime (166201631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 490 + ... + 18238.

Almost surely, 2^166201636 is an apocalyptic number.

It is an amenable number.

166201636 is a deficient number, since it is larger than the sum of its proper divisors (124791864).

166201636 is a wasteful number, since it uses less digits than its factorization.

166201636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20094 (or 20092 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 166201636 is about 12891.9213463316. The cubic root of 166201636 is about 549.8088988976.

The spelling of 166201636 in words is "one hundred sixty-six million, two hundred one thousand, six hundred thirty-six".