166380943 has 8 divisors (see below), whose sum is σ = 169281216. Its totient is φ = 163497600.

The previous prime is 166380871. The next prime is 166380959. The reversal of 166380943 is 349083661.

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 166380943 - 2¹⁷ = 166249871 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166380896 and 166380905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166380043) 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, 16458 + ... + 24568.

It is an arithmetic number, because the mean of its divisors is an integer number (21160152).

Almost surely, 2^166380943 is an apocalyptic number.

166380943 is a deficient number, since it is larger than the sum of its proper divisors (2900273).

166380943 is an equidigital number, since it uses as much as digits as its factorization.

166380943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8465.

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 166380943 is about 12898.8737105222. The cubic root of 166380943 is about 550.0065486824.

The spelling of 166380943 in words is "one hundred sixty-six million, three hundred eighty thousand, nine hundred forty-three".