166003043 has 4 divisors (see below), whose sum is σ = 166046280. Its totient is φ = 165959808.

The previous prime is 166003039. The next prime is 166003051. The reversal of 166003043 is 340300661.

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 166003043 - 2² = 166003039 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166003003) 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, 15230 + ... + 23747.

It is an arithmetic number, because the mean of its divisors is an integer number (41511570).

Almost surely, 2^166003043 is an apocalyptic number.

166003043 is a deficient number, since it is larger than the sum of its proper divisors (43237).

166003043 is an equidigital number, since it uses as much as digits as its factorization.

166003043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43236.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 166003043 is about 12884.2168174864. The cubic root of 166003043 is about 549.5898242051.

The spelling of 166003043 in words is "one hundred sixty-six million, three thousand, forty-three".