166213343 has 4 divisors (see below), whose sum is σ = 168554448. Its totient is φ = 163872240.

The previous prime is 166213321. The next prime is 166213363. The reversal of 166213343 is 343312661.

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 166213343 - 2²⁴ = 149436127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166213363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1170446 + ... + 1170587.

It is an arithmetic number, because the mean of its divisors is an integer number (42138612).

Almost surely, 2^166213343 is an apocalyptic number.

166213343 is a deficient number, since it is larger than the sum of its proper divisors (2341105).

166213343 is an equidigital number, since it uses as much as digits as its factorization.

166213343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2341104.

The product of its digits is 7776, while the sum is 29.

The square root of 166213343 is about 12892.3753823723. The cubic root of 166213343 is about 549.8218078393.

The spelling of 166213343 in words is "one hundred sixty-six million, two hundred thirteen thousand, three hundred forty-three".