166137213 has 16 divisors (see below), whose sum is σ = 243505152. Its totient is φ = 99918000.

The previous prime is 166137203. The next prime is 166137217. The reversal of 166137213 is 312731661.

It is a de Polignac number, because none of the positive numbers 2^k-166137213 is a prime.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 14893 + ... + 23538.

It is an arithmetic number, because the mean of its divisors is an integer number (15219072).

Almost surely, 2^166137213 is an apocalyptic number.

It is an amenable number.

166137213 is a deficient number, since it is larger than the sum of its proper divisors (77367939).

166137213 is a wasteful number, since it uses less digits than its factorization.

166137213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38576.

The product of its digits is 4536, while the sum is 30.

The square root of 166137213 is about 12889.4225239147. The cubic root of 166137213 is about 549.7378508280.

Adding to 166137213 its reverse (312731661), we get a palindrome (478868874).

The spelling of 166137213 in words is "one hundred sixty-six million, one hundred thirty-seven thousand, two hundred thirteen".