66325324309 has 2 divisors, whose sum is σ = 66325324310. Its totient is φ = 66325324308.

The previous prime is 66325324249. The next prime is 66325324327. The reversal of 66325324309 is 90342352366.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64125432900 + 2199891409 = 253230^2 + 46903^2 .

It is a cyclic number.

It is not a de Polignac number, because 66325324309 - 2¹⁷ = 66325193237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66325324369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33162662154 + 33162662155.

It is an arithmetic number, because the mean of its divisors is an integer number (33162662155).

Almost surely, 2^66325324309 is an apocalyptic number.

It is an amenable number.

66325324309 is a deficient number, since it is larger than the sum of its proper divisors (1).

66325324309 is an equidigital number, since it uses as much as digits as its factorization.

66325324309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 699840, while the sum is 43.

The spelling of 66325324309 in words is "sixty-six billion, three hundred twenty-five million, three hundred twenty-four thousand, three hundred nine".