166137212 has 12 divisors (see below), whose sum is σ = 290986416. Its totient is φ = 82998240.

The previous prime is 166137203. The next prime is 166137217. The reversal of 166137212 is 212731661.

It is a super-2 number, since 2×166137212² = 55203146422265888, which contains 22 as substring.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12089 + ... + 21872.

It is an arithmetic number, because the mean of its divisors is an integer number (24248868).

Almost surely, 2^166137212 is an apocalyptic number.

It is an amenable number.

166137212 is a deficient number, since it is larger than the sum of its proper divisors (124849204).

166137212 is a wasteful number, since it uses less digits than its factorization.

166137212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35188 (or 35186 counting only the distinct ones).

The product of its digits is 3024, while the sum is 29.

The square root of 166137212 is about 12889.4224851232. The cubic root of 166137212 is about 549.7378497250.

Adding to 166137212 its reverse (212731661), we get a palindrome (378868873).

The spelling of 166137212 in words is "one hundred sixty-six million, one hundred thirty-seven thousand, two hundred twelve".