166225243 has 16 divisors (see below), whose sum is σ = 180288000. Its totient is φ = 152766432.

The previous prime is 166225237. The next prime is 166225247. The reversal of 166225243 is 342522661.

It is a cyclic number.

It is not a de Polignac number, because 166225243 - 2⁹ = 166224731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166225247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87621 + ... + 89497.

It is an arithmetic number, because the mean of its divisors is an integer number (11268000).

Almost surely, 2^166225243 is an apocalyptic number.

166225243 is a deficient number, since it is larger than the sum of its proper divisors (14062757).

166225243 is a wasteful number, since it uses less digits than its factorization.

166225243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2034.

The product of its digits is 17280, while the sum is 31.

The square root of 166225243 is about 12892.8368872021. The cubic root of 166225243 is about 549.8349289747.

The spelling of 166225243 in words is "one hundred sixty-six million, two hundred twenty-five thousand, two hundred forty-three".