522666 has 16 divisors (see below), whose sum is σ = 1161600. Its totient is φ = 174204.

The previous prime is 522661. The next prime is 522673. The reversal of 522666 is 666225.

It is a Harshad number since it is a multiple of its sum of digits (27).

522666 is a modest number, since divided by 666 gives 522 as remainder.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (522661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4786 + ... + 4893.

It is an arithmetic number, because the mean of its divisors is an integer number (72600).

2⁵²²⁶⁶⁶ is an apocalyptic number.

522666 is an abundant number, since it is smaller than the sum of its proper divisors (638934).

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

522666 is a wasteful number, since it uses less digits than its factorization.

522666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9690 (or 9684 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 522666 is about 722.9564302225. The cubic root of 522666 is about 80.5517073249.

The spelling of 522666 in words is "five hundred twenty-two thousand, six hundred sixty-six".