666038267 has 2 divisors, whose sum is σ = 666038268. Its totient is φ = 666038266.

The previous prime is 666038213. The next prime is 666038279. The reversal of 666038267 is 762830666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 666038267 - 2¹⁸ = 665776123 is a prime.

It is not a weakly prime, because it can be changed into another prime (666038297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333019133 + 333019134.

It is an arithmetic number, because the mean of its divisors is an integer number (333019134).

Almost surely, 2^666038267 is an apocalyptic number.

666038267 is a deficient number, since it is larger than the sum of its proper divisors (1).

666038267 is an equidigital number, since it uses as much as digits as its factorization.

666038267 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 44.

The square root of 666038267 is about 25807.7171985435. The cubic root of 666038267 is about 873.3058996135.

The spelling of 666038267 in words is "six hundred sixty-six million, thirty-eight thousand, two hundred sixty-seven".