66366317 has 4 divisors (see below), whose sum is σ = 70270236. Its totient is φ = 62462400.

The previous prime is 66366281. The next prime is 66366347. The reversal of 66366317 is 71366366.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 61011721 + 5354596 = 7811^2 + 2314^2 .

It is a cyclic number.

It is not a de Polignac number, because 66366317 - 2⁸ = 66366061 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 (66366347) 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, 1951934 + ... + 1951967.

It is an arithmetic number, because the mean of its divisors is an integer number (17567559).

Almost surely, 2^66366317 is an apocalyptic number.

It is an amenable number.

66366317 is a deficient number, since it is larger than the sum of its proper divisors (3903919).

66366317 is a wasteful number, since it uses less digits than its factorization.

66366317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3903918.

The product of its digits is 81648, while the sum is 38.

The square root of 66366317 is about 8146.5524610107. The cubic root of 66366317 is about 404.8702871702.

The spelling of 66366317 in words is "sixty-six million, three hundred sixty-six thousand, three hundred seventeen".