318666 has 16 divisors (see below), whose sum is σ = 643104. Its totient is φ = 105264.

The previous prime is 318653. The next prime is 318671. The reversal of 318666 is 666813.

318666 is nontrivially palindromic in base 15.

318666 is an undulating number in base 15.

318666 is a modest number, since divided by 666 gives 318 as remainder.

It is an unprimeable number.

318666 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 7 ways as a sum of consecutive naturals, for example, 885 + ... + 1191.

It is an arithmetic number, because the mean of its divisors is an integer number (40194).

2³¹⁸⁶⁶⁶ is an apocalyptic number.

318666 is an abundant number, since it is smaller than the sum of its proper divisors (324438).

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

318666 is a wasteful number, since it uses less digits than its factorization.

318666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485.

The product of its digits is 5184, while the sum is 30.

The square root of 318666 is about 564.5050929797. The cubic root of 318666 is about 68.3038593227.

It can be divided in two parts, 3186 and 66, that multiplied together give a triangular number (210276 = T₆₄₈).

The spelling of 318666 in words is "three hundred eighteen thousand, six hundred sixty-six".