166211272 has 16 divisors (see below), whose sum is σ = 312163740. Its totient is φ = 82967616.

The previous prime is 166211251. The next prime is 166211273. The reversal of 166211272 is 272112661.

It can be written as a sum of positive squares in 2 ways, for example, as 157602916 + 8608356 = 12554^2 + 2934^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 166211272.

It is not an unprimeable number, because it can be changed into a prime (166211273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12043 + ... + 21850.

Almost surely, 2^166211272 is an apocalyptic number.

It is an amenable number.

166211272 is a deficient number, since it is larger than the sum of its proper divisors (145952468).

166211272 is a wasteful number, since it uses less digits than its factorization.

166211272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34512 (or 34508 counting only the distinct ones).

The product of its digits is 2016, while the sum is 28.

The square root of 166211272 is about 12892.2950633314. The cubic root of 166211272 is about 549.8195242567.

The spelling of 166211272 in words is "one hundred sixty-six million, two hundred eleven thousand, two hundred seventy-two".