66737317 has 2 divisors, whose sum is σ = 66737318. Its totient is φ = 66737316.

The previous prime is 66737311. The next prime is 66737339. The reversal of 66737317 is 71373766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39551521 + 27185796 = 6289^2 + 5214^2 .

It is a cyclic number.

It is not a de Polignac number, because 66737317 - 2³ = 66737309 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66737317.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66737311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33368658 + 33368659.

It is an arithmetic number, because the mean of its divisors is an integer number (33368659).

Almost surely, 2^66737317 is an apocalyptic number.

It is an amenable number.

66737317 is a deficient number, since it is larger than the sum of its proper divisors (1).

66737317 is an equidigital number, since it uses as much as digits as its factorization.

66737317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 111132, while the sum is 40.

The square root of 66737317 is about 8169.2910953154. The cubic root of 66737317 is about 405.6233190022.

The spelling of 66737317 in words is "sixty-six million, seven hundred thirty-seven thousand, three hundred seventeen".