18660146 has 8 divisors (see below), whose sum is σ = 28247340. Its totient is φ = 9244368.

The previous prime is 18660133. The next prime is 18660157. The reversal of 18660146 is 64106681.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17682025 + 978121 = 4205^2 + 989^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42581 + ... + 43016.

Almost surely, 2^18660146 is an apocalyptic number.

18660146 is a deficient number, since it is larger than the sum of its proper divisors (9587194).

18660146 is a wasteful number, since it uses less digits than its factorization.

18660146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85708.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 18660146 is about 4319.7391124928. The cubic root of 18660146 is about 265.2395887080.

The spelling of 18660146 in words is "eighteen million, six hundred sixty thousand, one hundred forty-six".