166660727 has 2 divisors, whose sum is σ = 166660728. Its totient is φ = 166660726.

The previous prime is 166660717. The next prime is 166660729. The reversal of 166660727 is 727066661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166660727 - 2⁸ = 166660471 is a prime.

Together with 166660729, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166660729) 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, 83330363 + 83330364.

It is an arithmetic number, because the mean of its divisors is an integer number (83330364).

Almost surely, 2^166660727 is an apocalyptic number.

166660727 is a deficient number, since it is larger than the sum of its proper divisors (1).

166660727 is an equidigital number, since it uses as much as digits as its factorization.

166660727 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 41.

The square root of 166660727 is about 12909.7144430076. The cubic root of 166660727 is about 550.3146706224.

The spelling of 166660727 in words is "one hundred sixty-six million, six hundred sixty thousand, seven hundred twenty-seven".