166137211 has 6 divisors (see below), whose sum is σ = 173675180. Its totient is φ = 158913348.

The previous prime is 166137203. The next prime is 166137217. The reversal of 166137211 is 112731661.

It is not a de Polignac number, because 166137211 - 2³ = 166137203 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166137211.

It is not an unprimeable number, because it can be changed into a prime (166137217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 156501 + ... + 157558.

Almost surely, 2^166137211 is an apocalyptic number.

166137211 is a deficient number, since it is larger than the sum of its proper divisors (7537969).

166137211 is an equidigital number, since it uses as much as digits as its factorization.

166137211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314105 (or 314082 counting only the distinct ones).

The product of its digits is 1512, while the sum is 28.

The square root of 166137211 is about 12889.4224463317. The cubic root of 166137211 is about 549.7378486220.

Adding to 166137211 its reverse (112731661), we get a palindrome (278868872).

The spelling of 166137211 in words is "one hundred sixty-six million, one hundred thirty-seven thousand, two hundred eleven".