66112538 has 8 divisors (see below), whose sum is σ = 99377280. Its totient is φ = 32986780.

The previous prime is 66112537. The next prime is 66112561. The reversal of 66112538 is 83521166.

It is a happy number.

66112538 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 not an unprimeable number, because it can be changed into a prime (66112531) 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, 33548 + ... + 35463.

It is an arithmetic number, because the mean of its divisors is an integer number (12422160).

Almost surely, 2^66112538 is an apocalyptic number.

66112538 is a deficient number, since it is larger than the sum of its proper divisors (33264742).

66112538 is a wasteful number, since it uses less digits than its factorization.

66112538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69492.

The product of its digits is 8640, while the sum is 32.

The square root of 66112538 is about 8130.9616897388. The cubic root of 66112538 is about 404.3535651034.

The spelling of 66112538 in words is "sixty-six million, one hundred twelve thousand, five hundred thirty-eight".