66741717 has 16 divisors (see below), whose sum is σ = 102316032. Its totient is φ = 37907760.

The previous prime is 66741683. The next prime is 66741721. The reversal of 66741717 is 71714766.

It is not a de Polignac number, because 66741717 - 2⁷ = 66741589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66741757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6009 + ... + 13022.

It is an arithmetic number, because the mean of its divisors is an integer number (6394752).

Almost surely, 2^66741717 is an apocalyptic number.

It is an amenable number.

66741717 is a deficient number, since it is larger than the sum of its proper divisors (35574315).

66741717 is a wasteful number, since it uses less digits than its factorization.

66741717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19208.

The product of its digits is 49392, while the sum is 39.

The square root of 66741717 is about 8169.5603920897. The cubic root of 66741717 is about 405.6322330724.

The spelling of 66741717 in words is "sixty-six million, seven hundred forty-one thousand, seven hundred seventeen".