660017 has 4 divisors (see below), whose sum is σ = 669936. Its totient is φ = 650100.

The previous prime is 660013. The next prime is 660029. The reversal of 660017 is 710066.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 660017 - 2² = 660013 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 660017.

It is not an unprimeable number, because it can be changed into a prime (660013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4859 + ... + 4992.

It is an arithmetic number, because the mean of its divisors is an integer number (167484).

2⁶⁶⁰⁰¹⁷ is an apocalyptic number.

660017 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

It is an amenable number.

660017 is a deficient number, since it is larger than the sum of its proper divisors (9919).

660017 is an equidigital number, since it uses as much as digits as its factorization.

660017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9918.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 660017 is about 812.4143031730. The cubic root of 660017 is about 87.0666244406.

The spelling of 660017 in words is "six hundred sixty thousand, seventeen".