418666 has 4 divisors (see below), whose sum is σ = 628002. Its totient is φ = 209332.

The previous prime is 418657. The next prime is 418667. The reversal of 418666 is 666814.

418666 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 229441 + 189225 = 479^2 + 435^2 .

It is an Ulam number.

418666 is a modest number, since divided by 666 gives 418 as remainder.

It is not an unprimeable number, because it can be changed into a prime (418667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104665 + ... + 104668.

2⁴¹⁸⁶⁶⁶ is an apocalyptic number.

418666 is a deficient number, since it is larger than the sum of its proper divisors (209336).

418666 is a wasteful number, since it uses less digits than its factorization.

418666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209335.

The product of its digits is 6912, while the sum is 31.

The square root of 418666 is about 647.0440479596. The cubic root of 418666 is about 74.8093528298.

The spelling of 418666 in words is "four hundred eighteen thousand, six hundred sixty-six".