16662043 has 2 divisors, whose sum is σ = 16662044. Its totient is φ = 16662042.

The previous prime is 16662011. The next prime is 16662049. The reversal of 16662043 is 34026661.

It is a strong prime.

It is an emirp because it is prime and its reverse (34026661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16662043 - 2⁵ = 16662011 is a prime.

It is not a weakly prime, because it can be changed into another prime (16662049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8331021 + 8331022.

It is an arithmetic number, because the mean of its divisors is an integer number (8331022).

Almost surely, 2^16662043 is an apocalyptic number.

16662043 is a deficient number, since it is larger than the sum of its proper divisors (1).

16662043 is an equidigital number, since it uses as much as digits as its factorization.

16662043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 16662043 is about 4081.9165841550. The cubic root of 16662043 is about 255.4128542173.

The spelling of 16662043 in words is "sixteen million, six hundred sixty-two thousand, forty-three".