66740741 has 8 divisors (see below), whose sum is σ = 68006400. Its totient is φ = 65479680.

The previous prime is 66740719. The next prime is 66740747. The reversal of 66740741 is 14704766.

It is a happy number.

66740741 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 66740741 - 2¹⁸ = 66478597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66740747) 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, 44636 + ... + 46106.

It is an arithmetic number, because the mean of its divisors is an integer number (8500800).

Almost surely, 2^66740741 is an apocalyptic number.

It is an amenable number.

66740741 is a deficient number, since it is larger than the sum of its proper divisors (1265659).

66740741 is a wasteful number, since it uses less digits than its factorization.

66740741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2299.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 66740741 is about 8169.5006579350. The cubic root of 66740741 is about 405.6302558034.

The spelling of 66740741 in words is "sixty-six million, seven hundred forty thousand, seven hundred forty-one".