660361 has 8 divisors (see below), whose sum is σ = 721280. Its totient is φ = 600912.

The previous prime is 660349. The next prime is 660367. The reversal of 660361 is 163066.

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

It is not a de Polignac number, because 660361 - 2⁵ = 660329 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660367) 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, 706 + ... + 1348.

It is an arithmetic number, because the mean of its divisors is an integer number (90160).

2⁶⁶⁰³⁶¹ is an apocalyptic number.

It is an amenable number.

660361 is a deficient number, since it is larger than the sum of its proper divisors (60919).

660361 is a wasteful number, since it uses less digits than its factorization.

660361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 660361 is about 812.6259902317. The cubic root of 660361 is about 87.0817481505.

The spelling of 660361 in words is "six hundred sixty thousand, three hundred sixty-one".