65606647 has 2 divisors, whose sum is σ = 65606648. Its totient is φ = 65606646.

The previous prime is 65606641. The next prime is 65606657. The reversal of 65606647 is 74660656.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65606647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65606641) 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 as a sum of consecutive naturals, namely, 32803323 + 32803324.

It is an arithmetic number, because the mean of its divisors is an integer number (32803324).

Almost surely, 2^65606647 is an apocalyptic number.

65606647 is a deficient number, since it is larger than the sum of its proper divisors (1).

65606647 is an equidigital number, since it uses as much as digits as its factorization.

65606647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 40.

The square root of 65606647 is about 8099.7930220469. The cubic root of 65606647 is about 403.3195564055.

The spelling of 65606647 in words is "sixty-five million, six hundred six thousand, six hundred forty-seven".