66707413 has 2 divisors, whose sum is σ = 66707414. Its totient is φ = 66707412.

The previous prime is 66707359. The next prime is 66707419. The reversal of 66707413 is 31470766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66552964 + 154449 = 8158^2 + 393^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66707413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66707419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33353706 + 33353707.

It is an arithmetic number, because the mean of its divisors is an integer number (33353707).

Almost surely, 2^66707413 is an apocalyptic number.

It is an amenable number.

66707413 is a deficient number, since it is larger than the sum of its proper divisors (1).

66707413 is an equidigital number, since it uses as much as digits as its factorization.

66707413 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 66707413 is about 8167.4606212702. The cubic root of 66707413 is about 405.5627253571.

The spelling of 66707413 in words is "sixty-six million, seven hundred seven thousand, four hundred thirteen".