66342118 has 4 divisors (see below), whose sum is σ = 99513180. Its totient is φ = 33171058.

The previous prime is 66342071. The next prime is 66342151. The reversal of 66342118 is 81124366.

It is a happy number.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 66342118.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16585528 + ... + 16585531.

It is an arithmetic number, because the mean of its divisors is an integer number (24878295).

Almost surely, 2^66342118 is an apocalyptic number.

66342118 is a deficient number, since it is larger than the sum of its proper divisors (33171062).

66342118 is a wasteful number, since it uses less digits than its factorization.

66342118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33171061.

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

The square root of 66342118 is about 8145.0670961018. The cubic root of 66342118 is about 404.8210722091.

The spelling of 66342118 in words is "sixty-six million, three hundred forty-two thousand, one hundred eighteen".