66140241 has 4 divisors (see below), whose sum is σ = 88186992. Its totient is φ = 44093492.

The previous prime is 66140209. The next prime is 66140297. The reversal of 66140241 is 14204166.

66140241 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66140241 - 2⁵ = 66140209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66140141) 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, 11023371 + ... + 11023376.

It is an arithmetic number, because the mean of its divisors is an integer number (22046748).

Almost surely, 2^66140241 is an apocalyptic number.

It is an amenable number.

66140241 is a deficient number, since it is larger than the sum of its proper divisors (22046751).

66140241 is a wasteful number, since it uses less digits than its factorization.

66140241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22046750.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 66140241 is about 8132.6650613437. The cubic root of 66140241 is about 404.4100356958.

The spelling of 66140241 in words is "sixty-six million, one hundred forty thousand, two hundred forty-one".