660319 has 4 divisors (see below), whose sum is σ = 720360. Its totient is φ = 600280.

The previous prime is 660299. The next prime is 660329. The reversal of 660319 is 913066.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-660319 is a prime.

It is a super-2 number, since 2×660319² = 872042363522, which contains 22 as substring.

It is a Duffinian number.

660319 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 660293 and 660302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660329) 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 3 ways as a sum of consecutive naturals, for example, 30004 + ... + 30025.

It is an arithmetic number, because the mean of its divisors is an integer number (180090).

2⁶⁶⁰³¹⁹ is an apocalyptic number.

660319 is a deficient number, since it is larger than the sum of its proper divisors (60041).

660319 is a wasteful number, since it uses less digits than its factorization.

660319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60040.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 660319 is about 812.6001476741. The cubic root of 660319 is about 87.0799019326.

It can be divided in two parts, 660 and 319, that added together give a palindrome (979).

The spelling of 660319 in words is "six hundred sixty thousand, three hundred nineteen".