16661927 has 2 divisors, whose sum is σ = 16661928. Its totient is φ = 16661926.

The previous prime is 16661903. The next prime is 16661971. The reversal of 16661927 is 72916661.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16661927 is a prime.

It is a super-2 number, since 2×16661927² = 555239622706658, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16661987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8330963 + 8330964.

It is an arithmetic number, because the mean of its divisors is an integer number (8330964).

Almost surely, 2^16661927 is an apocalyptic number.

16661927 is a deficient number, since it is larger than the sum of its proper divisors (1).

16661927 is an equidigital number, since it uses as much as digits as its factorization.

16661927 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 38.

The square root of 16661927 is about 4081.9023751187. The cubic root of 16661927 is about 255.4122614937.

The spelling of 16661927 in words is "sixteen million, six hundred sixty-one thousand, nine hundred twenty-seven".