66123238 has 8 divisors (see below), whose sum is σ = 100665432. Its totient is φ = 32568096.

The previous prime is 66123209. The next prime is 66123257. The reversal of 66123238 is 83232166.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 246595 + ... + 246862.

It is an arithmetic number, because the mean of its divisors is an integer number (12583179).

Almost surely, 2^66123238 is an apocalyptic number.

66123238 is a deficient number, since it is larger than the sum of its proper divisors (34542194).

66123238 is a wasteful number, since it uses less digits than its factorization.

66123238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493526.

The product of its digits is 10368, while the sum is 31.

The square root of 66123238 is about 8131.6196418672. The cubic root of 66123238 is about 404.3753781608.

The spelling of 66123238 in words is "sixty-six million, one hundred twenty-three thousand, two hundred thirty-eight".