666486 has 24 divisors (see below), whose sum is σ = 1470144. Its totient is φ = 218160.

The previous prime is 666467. The next prime is 666493. The reversal of 666486 is 684666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 666486.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 795 + ... + 1401.

It is an arithmetic number, because the mean of its divisors is an integer number (61256).

2⁶⁶⁶⁴⁸⁶ is an apocalyptic number.

666486 is an abundant number, since it is smaller than the sum of its proper divisors (803658).

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

666486 is a wasteful number, since it uses less digits than its factorization.

666486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676 (or 673 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 666486 is about 816.3859381445. The cubic root of 666486 is about 87.3501544171.

The spelling of 666486 in words is "six hundred sixty-six thousand, four hundred eighty-six".