65606623 has 2 divisors, whose sum is σ = 65606624. Its totient is φ = 65606622.

The previous prime is 65606599. The next prime is 65606641. The reversal of 65606623 is 32660656.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65606623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65606693) 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, 32803311 + 32803312.

It is an arithmetic number, because the mean of its divisors is an integer number (32803312).

Almost surely, 2^65606623 is an apocalyptic number.

65606623 is a deficient number, since it is larger than the sum of its proper divisors (1).

65606623 is an equidigital number, since it uses as much as digits as its factorization.

65606623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 34.

The square root of 65606623 is about 8099.7915405274. The cubic root of 65606623 is about 403.3195072251.

The spelling of 65606623 in words is "sixty-five million, six hundred six thousand, six hundred twenty-three".