66548317 has 16 divisors (see below), whose sum is σ = 76968000. Its totient is φ = 56903040.

The previous prime is 66548309. The next prime is 66548323. The reversal of 66548317 is 71384566.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 66548317 - 2³ = 66548309 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66548317.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66548327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30073 + ... + 32209.

It is an arithmetic number, because the mean of its divisors is an integer number (4810500).

Almost surely, 2^66548317 is an apocalyptic number.

It is an amenable number.

66548317 is a deficient number, since it is larger than the sum of its proper divisors (10419683).

66548317 is a wasteful number, since it uses less digits than its factorization.

66548317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2316.

The product of its digits is 120960, while the sum is 40.

The square root of 66548317 is about 8157.7151825741. The cubic root of 66548317 is about 405.2400487197.

The spelling of 66548317 in words is "sixty-six million, five hundred forty-eight thousand, three hundred seventeen".