166157229 has 32 divisors (see below), whose sum is σ = 259348480. Its totient is φ = 92664000.

The previous prime is 166157227. The next prime is 166157237. The reversal of 166157229 is 922751661.

It is not a de Polignac number, because 166157229 - 2¹ = 166157227 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166157227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 193002 + ... + 193860.

It is an arithmetic number, because the mean of its divisors is an integer number (8104640).

Almost surely, 2^166157229 is an apocalyptic number.

It is an amenable number.

166157229 is a deficient number, since it is larger than the sum of its proper divisors (93191251).

166157229 is a wasteful number, since it uses less digits than its factorization.

166157229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1081.

The product of its digits is 45360, while the sum is 39.

The square root of 166157229 is about 12890.1989511411. The cubic root of 166157229 is about 549.7599271803.

The spelling of 166157229 in words is "one hundred sixty-six million, one hundred fifty-seven thousand, two hundred twenty-nine".