66505363 has 2 divisors, whose sum is σ = 66505364. Its totient is φ = 66505362.

The previous prime is 66505337. The next prime is 66505379. The reversal of 66505363 is 36350566.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66505363 is a prime.

It is not a weakly prime, because it can be changed into another prime (66505303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33252681 + 33252682.

It is an arithmetic number, because the mean of its divisors is an integer number (33252682).

Almost surely, 2^66505363 is an apocalyptic number.

66505363 is a deficient number, since it is larger than the sum of its proper divisors (1).

66505363 is an equidigital number, since it uses as much as digits as its factorization.

66505363 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48600, while the sum is 34.

The square root of 66505363 is about 8155.0820351484. The cubic root of 66505363 is about 405.1528417686.

The spelling of 66505363 in words is "sixty-six million, five hundred five thousand, three hundred sixty-three".