660711 has 8 divisors (see below), whose sum is σ = 889200. Its totient is φ = 436352.

The previous prime is 660683. The next prime is 660719. The reversal of 660711 is 117066.

660711 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 660711 - 2⁹ = 660199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660719) 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, 636 + ... + 1313.

It is an arithmetic number, because the mean of its divisors is an integer number (111150).

2⁶⁶⁰⁷¹¹ is an apocalyptic number.

660711 is a deficient number, since it is larger than the sum of its proper divisors (228489).

660711 is a wasteful number, since it uses less digits than its factorization.

660711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2065.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 660711 is about 812.8413129265. The cubic root of 660711 is about 87.0971302565.

Adding to 660711 its reverse (117066), we get a palindrome (777777).

The spelling of 660711 in words is "six hundred sixty thousand, seven hundred eleven".