66112643 has 8 divisors (see below), whose sum is σ = 70073712. Its totient is φ = 62159616.

The previous prime is 66112639. The next prime is 66112661. The reversal of 66112643 is 34621166.

It is a happy number.

66112643 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 a de Polignac number, because 66112643 - 2² = 66112639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66112633) 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 7 ways as a sum of consecutive naturals, for example, 26996 + ... + 29342.

It is an arithmetic number, because the mean of its divisors is an integer number (8759214).

Almost surely, 2^66112643 is an apocalyptic number.

66112643 is a deficient number, since it is larger than the sum of its proper divisors (3961069).

66112643 is a wasteful number, since it uses less digits than its factorization.

66112643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4021.

The product of its digits is 5184, while the sum is 29.

The square root of 66112643 is about 8130.9681465370. The cubic root of 66112643 is about 404.3537791682.

The spelling of 66112643 in words is "sixty-six million, one hundred twelve thousand, six hundred forty-three".