66750317 has 4 divisors (see below), whose sum is σ = 66768096. Its totient is φ = 66732540.

The previous prime is 66750269. The next prime is 66750329. The reversal of 66750317 is 71305766.

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 66750317 - 2⁶ = 66750253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66750017) 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 3 ways as a sum of consecutive naturals, for example, 809 + ... + 11582.

It is an arithmetic number, because the mean of its divisors is an integer number (16692024).

Almost surely, 2^66750317 is an apocalyptic number.

It is an amenable number.

66750317 is a deficient number, since it is larger than the sum of its proper divisors (17779).

66750317 is a wasteful number, since it uses less digits than its factorization.

66750317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17778.

The product of its (nonzero) digits is 26460, while the sum is 35.

The square root of 66750317 is about 8170.0867192460. The cubic root of 66750317 is about 405.6496548966.

The spelling of 66750317 in words is "sixty-six million, seven hundred fifty thousand, three hundred seventeen".