18066586 has 8 divisors (see below), whose sum is σ = 27206100. Its totient is φ = 8997888.

The previous prime is 18066571. The next prime is 18066593. The reversal of 18066586 is 68566081.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 14205361 + 3861225 = 3769^2 + 1965^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17061 + ... + 18088.

Almost surely, 2^18066586 is an apocalyptic number.

18066586 is a deficient number, since it is larger than the sum of its proper divisors (9139514).

18066586 is a wasteful number, since it uses less digits than its factorization.

18066586 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35408.

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 18066586 is about 4250.4806786998. The cubic root of 18066586 is about 262.3968985883.

It can be divided in two parts, 180 and 66586, that added together give a palindrome (66766).

The spelling of 18066586 in words is "eighteen million, sixty-six thousand, five hundred eighty-six".