66717441 has 12 divisors (see below), whose sum is σ = 110136832. Its totient is φ = 38124216.

The previous prime is 66717439. The next prime is 66717463. The reversal of 66717441 is 14471766.

It is not a de Polignac number, because 66717441 - 2¹ = 66717439 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66717396 and 66717405.

It is not an unprimeable number, because it can be changed into a prime (66717481) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 529441 + ... + 529566.

Almost surely, 2^66717441 is an apocalyptic number.

It is an amenable number.

66717441 is a deficient number, since it is larger than the sum of its proper divisors (43419391).

66717441 is a wasteful number, since it uses less digits than its factorization.

66717441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059020 (or 1059017 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 66717441 is about 8168.0744977014. The cubic root of 66717441 is about 405.5830468329.

The spelling of 66717441 in words is "sixty-six million, seven hundred seventeen thousand, four hundred forty-one".