18142666 has 8 divisors (see below), whose sum is σ = 27558720. Its totient is φ = 8956428.

The previous prime is 18142651. The next prime is 18142673. The reversal of 18142666 is 66624181.

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, 57256 + ... + 57571.

It is an arithmetic number, because the mean of its divisors is an integer number (3444840).

Almost surely, 2^18142666 is an apocalyptic number.

18142666 is a deficient number, since it is larger than the sum of its proper divisors (9416054).

18142666 is a wasteful number, since it uses less digits than its factorization.

18142666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114908.

The product of its digits is 13824, while the sum is 34.

The square root of 18142666 is about 4259.4208526512. The cubic root of 18142666 is about 262.7647083341.

The spelling of 18142666 in words is "eighteen million, one hundred forty-two thousand, six hundred sixty-six".