666017 has 8 divisors (see below), whose sum is σ = 732672. Its totient is φ = 600400.

The previous prime is 666013. The next prime is 666019. The reversal of 666017 is 710666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 666017 - 2² = 666013 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1943 + ... + 2259.

It is an arithmetic number, because the mean of its divisors is an integer number (91584).

2⁶⁶⁶⁰¹⁷ is an apocalyptic number.

It is an amenable number.

666017 is a deficient number, since it is larger than the sum of its proper divisors (66655).

666017 is a wasteful number, since it uses less digits than its factorization.

666017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 666017 is about 816.0986459981. The cubic root of 666017 is about 87.3296604455.

The spelling of 666017 in words is "six hundred sixty-six thousand, seventeen".