166003243 has 8 divisors (see below), whose sum is σ = 189982688. Its totient is φ = 142089984.

The previous prime is 166003223. The next prime is 166003273. The reversal of 166003243 is 342300661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 166003243 - 2²¹ = 163906091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166003223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11046 + ... + 21307.

It is an arithmetic number, because the mean of its divisors is an integer number (23747836).

Almost surely, 2^166003243 is an apocalyptic number.

166003243 is a deficient number, since it is larger than the sum of its proper divisors (23979445).

166003243 is an equidigital number, since it uses as much as digits as its factorization.

166003243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33093.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 166003243 is about 12884.2245789182. The cubic root of 166003243 is about 549.5900449197.

The spelling of 166003243 in words is "one hundred sixty-six million, three thousand, two hundred forty-three".