666207 has 12 divisors (see below), whose sum is σ = 975520. Its totient is φ = 438048.

The previous prime is 666203. The next prime is 666229. The reversal of 666207 is 702666.

It is not a de Polignac number, because 666207 - 2² = 666203 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 243 + ... + 1179.

2⁶⁶⁶²⁰⁷ is an apocalyptic number.

666207 is a deficient number, since it is larger than the sum of its proper divisors (309313).

666207 is a wasteful number, since it uses less digits than its factorization.

666207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1022 (or 1019 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 666207 is about 816.2150451934. The cubic root of 666207 is about 87.3379640663.

The spelling of 666207 in words is "six hundred sixty-six thousand, two hundred seven".