66118238 has 16 divisors (see below), whose sum is σ = 103883040. Its totient is φ = 31501536.

The previous prime is 66118211. The next prime is 66118249. The reversal of 66118238 is 83281166.

It is a junction number, because it is equal to n+sod(n) for n = 66118198 and 66118207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10148 + ... + 15336.

It is an arithmetic number, because the mean of its divisors is an integer number (6492690).

Almost surely, 2^66118238 is an apocalyptic number.

66118238 is a deficient number, since it is larger than the sum of its proper divisors (37764802).

66118238 is a wasteful number, since it uses less digits than its factorization.

66118238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5491.

The product of its digits is 13824, while the sum is 35.

The square root of 66118238 is about 8131.3121942279. The cubic root of 66118238 is about 404.3651854363.

The spelling of 66118238 in words is "sixty-six million, one hundred eighteen thousand, two hundred thirty-eight".