4518666 has 20 divisors (see below), whose sum is σ = 10125522. Its totient is φ = 1506168.

The previous prime is 4518643. The next prime is 4518667. The reversal of 4518666 is 6668154.

It can be written as a sum of positive squares in only one way, i.e., 2313441 + 2205225 = 1521^2 + 1485^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 4518666.

It is not an unprimeable number, because it can be changed into a prime (4518667) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 13785 + ... + 14108.

Almost surely, 2^4518666 is an apocalyptic number.

4518666 is an abundant number, since it is smaller than the sum of its proper divisors (5606856).

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

4518666 is a wasteful number, since it uses less digits than its factorization.

4518666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27907 (or 27898 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 4518666 is about 2125.7154089859. The cubic root of 4518666 is about 165.3243207814.

It can be divided in two parts, 4518 and 666, that added together give a square (5184 = 72²).

The spelling of 4518666 in words is "four million, five hundred eighteen thousand, six hundred sixty-six".