660505054969 has 2 divisors, whose sum is σ = 660505054970. Its totient is φ = 660505054968.

The previous prime is 660505054943. The next prime is 660505055039. The reversal of 660505054969 is 969450505066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 365313865744 + 295191189225 = 604412^2 + 543315^2 .

It is a cyclic number.

It is not a de Polignac number, because 660505054969 - 2¹⁵ = 660505022201 is a prime.

It is a super-2 number, since 2×660505054969² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (660505054169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330252527484 + 330252527485.

It is an arithmetic number, because the mean of its divisors is an integer number (330252527485).

Almost surely, 2^660505054969 is an apocalyptic number.

It is an amenable number.

660505054969 is a deficient number, since it is larger than the sum of its proper divisors (1).

660505054969 is an equidigital number, since it uses as much as digits as its factorization.

660505054969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8748000, while the sum is 55.

The spelling of 660505054969 in words is "six hundred sixty billion, five hundred five million, fifty-four thousand, nine hundred sixty-nine".