668576 has 24 divisors (see below), whose sum is σ = 1394820. Its totient is φ = 314368.

The previous prime is 668567. The next prime is 668579. The reversal of 668576 is 675866.

It can be written as a sum of positive squares in 2 ways, for example, as 524176 + 144400 = 724^2 + 380^2 .

It is not an unprimeable number, because it can be changed into a prime (668579) by changing a digit.

668576 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71 + ... + 1158.

2⁶⁶⁸⁵⁷⁶ is an apocalyptic number.

It is an amenable number.

668576 is an abundant number, since it is smaller than the sum of its proper divisors (726244).

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

668576 is a wasteful number, since it uses less digits than its factorization.

668576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1256 (or 1248 counting only the distinct ones).

The product of its digits is 60480, while the sum is 38.

The square root of 668576 is about 817.6649680645. The cubic root of 668576 is about 87.4413647980.

The spelling of 668576 in words is "six hundred sixty-eight thousand, five hundred seventy-six".