320666963 has 2 divisors, whose sum is σ = 320666964. Its totient is φ = 320666962.

The previous prime is 320666921. The next prime is 320666977. The reversal of 320666963 is 369666023.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 320666963 - 2¹⁴ = 320650579 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 320666963.

It is not a weakly prime, because it can be changed into another prime (320666663) 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, 160333481 + 160333482.

It is an arithmetic number, because the mean of its divisors is an integer number (160333482).

Almost surely, 2^320666963 is an apocalyptic number.

320666963 is a deficient number, since it is larger than the sum of its proper divisors (1).

320666963 is an equidigital number, since it uses as much as digits as its factorization.

320666963 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 209952, while the sum is 41.

The square root of 320666963 is about 17907.1762989032. The cubic root of 320666963 is about 684.4652533557.

The spelling of 320666963 in words is "three hundred twenty million, six hundred sixty-six thousand, nine hundred sixty-three".