660712 has 16 divisors (see below), whose sum is σ = 1334340. Its totient is φ = 304896.

The previous prime is 660683. The next prime is 660719. The reversal of 660712 is 217066.

It can be written as a sum of positive squares in 2 ways, for example, as 630436 + 30276 = 794^2 + 174^2 .

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 3 ways as a sum of consecutive naturals, for example, 3073 + ... + 3280.

2⁶⁶⁰⁷¹² is an apocalyptic number.

It is an amenable number.

660712 is an abundant number, since it is smaller than the sum of its proper divisors (673628).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

660712 is a wasteful number, since it uses less digits than its factorization.

660712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6372 (or 6368 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 660712 is about 812.8419280524. The cubic root of 660712 is about 87.0971741976.

Adding to 660712 its reverse (217066), we get a palindrome (877778).

The spelling of 660712 in words is "six hundred sixty thousand, seven hundred twelve".