16668727 has 2 divisors, whose sum is σ = 16668728. Its totient is φ = 16668726.

The previous prime is 16668713. The next prime is 16668733. The reversal of 16668727 is 72786661.

It is a strong prime.

It is an emirp because it is prime and its reverse (72786661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16668727 - 2¹⁵ = 16635959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16668797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8334363 + 8334364.

It is an arithmetic number, because the mean of its divisors is an integer number (8334364).

Almost surely, 2^16668727 is an apocalyptic number.

16668727 is a deficient number, since it is larger than the sum of its proper divisors (1).

16668727 is an equidigital number, since it uses as much as digits as its factorization.

16668727 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 43.

The square root of 16668727 is about 4082.7352351089. The cubic root of 16668727 is about 255.4470027166.

The spelling of 16668727 in words is "sixteen million, six hundred sixty-eight thousand, seven hundred twenty-seven".