666576 has 40 divisors (see below), whose sum is σ = 1914560. Its totient is φ = 222048.

The previous prime is 666559. The next prime is 666599. The reversal of 666576 is 675666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 666576.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 340 + ... + 1203.

It is an arithmetic number, because the mean of its divisors is an integer number (47864).

2⁶⁶⁶⁵⁷⁶ is an apocalyptic number.

It is an amenable number.

666576 is an abundant number, since it is smaller than the sum of its proper divisors (1247984).

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

666576 is a wasteful number, since it uses less digits than its factorization.

666576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1560 (or 1548 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 666576 is about 816.4410572724. The cubic root of 666576 is about 87.3540860626.

The spelling of 666576 in words is "six hundred sixty-six thousand, five hundred seventy-six".