660575644969 has 2 divisors, whose sum is σ = 660575644970. Its totient is φ = 660575644968.

The previous prime is 660575644931. The next prime is 660575644987. The reversal of 660575644969 is 969446575066.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 596408675625 + 64166969344 = 772275^2 + 253312^2 .

It is a cyclic number.

It is not a de Polignac number, because 660575644969 - 2⁹ = 660575644457 is a prime.

It is a super-2 number, since 2×660575644969² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (660575644999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330287822484 + 330287822485.

It is an arithmetic number, because the mean of its divisors is an integer number (330287822485).

Almost surely, 2^660575644969 is an apocalyptic number.

It is an amenable number.

660575644969 is a deficient number, since it is larger than the sum of its proper divisors (1).

660575644969 is an equidigital number, since it uses as much as digits as its factorization.

660575644969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 293932800, while the sum is 67.

The spelling of 660575644969 in words is "six hundred sixty billion, five hundred seventy-five million, six hundred forty-four thousand, nine hundred sixty-nine".