66118338 has 96 divisors (see below), whose sum is σ = 178319232. Its totient is φ = 17395200.

The previous prime is 66118333. The next prime is 66118361. The reversal of 66118338 is 83381166.

66118338 is a `hidden beast` number, since 6 + 611 + 8 + 3 + 38 = 666.

66118338 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (66118333) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 43003 + ... + 44513.

It is an arithmetic number, because the mean of its divisors is an integer number (1857492).

Almost surely, 2^66118338 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66118338, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89159616).

66118338 is an abundant number, since it is smaller than the sum of its proper divisors (112200894).

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

66118338 is a wasteful number, since it uses less digits than its factorization.

66118338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1560 (or 1557 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 66118338 is about 8131.3183432946. The cubic root of 66118338 is about 404.3653892958.

The spelling of 66118338 in words is "sixty-six million, one hundred eighteen thousand, three hundred thirty-eight".