666071327 has 2 divisors, whose sum is σ = 666071328. Its totient is φ = 666071326.

The previous prime is 666071323. The next prime is 666071389. The reversal of 666071327 is 723170666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 666071327 - 2² = 666071323 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (666071323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333035663 + 333035664.

It is an arithmetic number, because the mean of its divisors is an integer number (333035664).

Almost surely, 2^666071327 is an apocalyptic number.

666071327 is a deficient number, since it is larger than the sum of its proper divisors (1).

666071327 is an equidigital number, since it uses as much as digits as its factorization.

666071327 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 38.

The square root of 666071327 is about 25808.3576966842. The cubic root of 666071327 is about 873.3203487409.

The spelling of 666071327 in words is "six hundred sixty-six million, seventy-one thousand, three hundred twenty-seven".