166534243 has 4 divisors (see below), whose sum is σ = 168815608. Its totient is φ = 164252880.

The previous prime is 166534241. The next prime is 166534253. The reversal of 166534243 is 342435661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 166534243 - 2¹ = 166534241 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166534199 and 166534208.

It is not an unprimeable number, because it can be changed into a prime (166534241) 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, 1140573 + ... + 1140718.

It is an arithmetic number, because the mean of its divisors is an integer number (42203902).

Almost surely, 2^166534243 is an apocalyptic number.

166534243 is a deficient number, since it is larger than the sum of its proper divisors (2281365).

166534243 is an equidigital number, since it uses as much as digits as its factorization.

166534243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2281364.

The product of its digits is 51840, while the sum is 34.

The square root of 166534243 is about 12904.8147216456. The cubic root of 166534243 is about 550.1754184258.

The spelling of 166534243 in words is "one hundred sixty-six million, five hundred thirty-four thousand, two hundred forty-three".