66853138 has 8 divisors (see below), whose sum is σ = 109396080. Its totient is φ = 30387780.

The previous prime is 66853121. The next prime is 66853139. The reversal of 66853138 is 83135866.

66853138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a self number, because there is not a number n which added to its sum of digits gives 66853138.

It is not an unprimeable number, because it can be changed into a prime (66853139) 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 3 ways as a sum of consecutive naturals, for example, 1519368 + ... + 1519411.

It is an arithmetic number, because the mean of its divisors is an integer number (13674510).

Almost surely, 2^66853138 is an apocalyptic number.

66853138 is a deficient number, since it is larger than the sum of its proper divisors (42542942).

66853138 is a wasteful number, since it uses less digits than its factorization.

66853138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3038792.

The product of its digits is 103680, while the sum is 40.

The square root of 66853138 is about 8176.3768259541. The cubic root of 66853138 is about 405.8578332108.

The spelling of 66853138 in words is "sixty-six million, eight hundred fifty-three thousand, one hundred thirty-eight".