660963559 has 2 divisors, whose sum is σ = 660963560. Its totient is φ = 660963558.

The previous prime is 660963497. The next prime is 660963593. The reversal of 660963559 is 955369066.

It is a happy number.

660963559 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 660963559 - 2¹³ = 660955367 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (660961559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330481779 + 330481780.

It is an arithmetic number, because the mean of its divisors is an integer number (330481780).

Almost surely, 2^660963559 is an apocalyptic number.

660963559 is a deficient number, since it is larger than the sum of its proper divisors (1).

660963559 is an equidigital number, since it uses as much as digits as its factorization.

660963559 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1312200, while the sum is 49.

The square root of 660963559 is about 25709.2115592836. The cubic root of 660963559 is about 871.0822656635.

The spelling of 660963559 in words is "six hundred sixty million, nine hundred sixty-three thousand, five hundred fifty-nine".