16665043 has 2 divisors, whose sum is σ = 16665044. Its totient is φ = 16665042.

The previous prime is 16665029. The next prime is 16665137. The reversal of 16665043 is 34056661.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16665043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16664996 and 16665014.

It is not a weakly prime, because it can be changed into another prime (16665023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8332521 + 8332522.

It is an arithmetic number, because the mean of its divisors is an integer number (8332522).

Almost surely, 2^16665043 is an apocalyptic number.

16665043 is a deficient number, since it is larger than the sum of its proper divisors (1).

16665043 is an equidigital number, since it uses as much as digits as its factorization.

16665043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 16665043 is about 4082.2840420529. The cubic root of 16665043 is about 255.4281823213.

The spelling of 16665043 in words is "sixteen million, six hundred sixty-five thousand, forty-three".