66123841 has 8 divisors (see below), whose sum is σ = 76698560. Its totient is φ = 55831248.

The previous prime is 66123839. The next prime is 66123881. The reversal of 66123841 is 14832166.

It is a happy number.

66123841 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 cyclic number.

It is not a de Polignac number, because 66123841 - 2¹ = 66123839 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66123881) 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, 70026 + ... + 70963.

It is an arithmetic number, because the mean of its divisors is an integer number (9587320).

Almost surely, 2^66123841 is an apocalyptic number.

It is an amenable number.

66123841 is a deficient number, since it is larger than the sum of its proper divisors (10574719).

66123841 is a wasteful number, since it uses less digits than its factorization.

66123841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141063.

The product of its digits is 6912, while the sum is 31.

The square root of 66123841 is about 8131.6567192670. The cubic root of 66123841 is about 404.3766073687.

The spelling of 66123841 in words is "sixty-six million, one hundred twenty-three thousand, eight hundred forty-one".