66742727 has 2 divisors, whose sum is σ = 66742728. Its totient is φ = 66742726.

The previous prime is 66742703. The next prime is 66742733. The reversal of 66742727 is 72724766.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66742727 - 2⁸ = 66742471 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66742927) 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, 33371363 + 33371364.

It is an arithmetic number, because the mean of its divisors is an integer number (33371364).

Almost surely, 2^66742727 is an apocalyptic number.

66742727 is a deficient number, since it is larger than the sum of its proper divisors (1).

66742727 is an equidigital number, since it uses as much as digits as its factorization.

66742727 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 197568, while the sum is 41.

The square root of 66742727 is about 8169.6222066874. The cubic root of 66742727 is about 405.6342792014.

The spelling of 66742727 in words is "sixty-six million, seven hundred forty-two thousand, seven hundred twenty-seven".