666727 has 2 divisors, whose sum is σ = 666728. Its totient is φ = 666726.

The previous prime is 666707. The next prime is 666733. The reversal of 666727 is 727666.

666727 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 666727 - 2⁷ = 666599 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 666692 and 666701.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (666707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333363 + 333364.

It is an arithmetic number, because the mean of its divisors is an integer number (333364).

666727 is a Friedman number, since it can be written as 7^7-(66*6)^2, using all its digits and the basic arithmetic operations.

2⁶⁶⁶⁷²⁷ is an apocalyptic number.

666727 is a deficient number, since it is larger than the sum of its proper divisors (1).

666727 is an equidigital number, since it uses as much as digits as its factorization.

666727 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 34.

The square root of 666727 is about 816.5335265621. The cubic root of 666727 is about 87.3606816952.

The spelling of 666727 in words is "six hundred sixty-six thousand, seven hundred twenty-seven".