65655563 has 2 divisors, whose sum is σ = 65655564. Its totient is φ = 65655562.

The previous prime is 65655559. The next prime is 65655607. The reversal of 65655563 is 36555656.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65655563 - 2² = 65655559 is a prime.

It is a Sophie Germain prime.

It is equal to p_3876953 and since 65655563 and 3876953 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65655563.

It is not a weakly prime, because it can be changed into another prime (65655503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32827781 + 32827782.

It is an arithmetic number, because the mean of its divisors is an integer number (32827782).

Almost surely, 2^65655563 is an apocalyptic number.

65655563 is a deficient number, since it is larger than the sum of its proper divisors (1).

65655563 is an equidigital number, since it uses as much as digits as its factorization.

65655563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 405000, while the sum is 41.

The square root of 65655563 is about 8102.8120427417. The cubic root of 65655563 is about 403.4197692097.

The spelling of 65655563 in words is "sixty-five million, six hundred fifty-five thousand, five hundred sixty-three".