660760426826459 has 2 divisors, whose sum is σ = 660760426826460. Its totient is φ = 660760426826458.

The previous prime is 660760426826431. The next prime is 660760426826501. The reversal of 660760426826459 is 954628624067066.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 660760426826459 - 2¹⁶ = 660760426760923 is a prime.

It is a super-2 number, since 2×660760426826459² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 660760426826392 and 660760426826401.

It is not a weakly prime, because it can be changed into another prime (660760426822459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330380213413229 + 330380213413230.

It is an arithmetic number, because the mean of its divisors is an integer number (330380213413230).

Almost surely, 2^{660760426826459} is an apocalyptic number.

660760426826459 is a deficient number, since it is larger than the sum of its proper divisors (1).

660760426826459 is an equidigital number, since it uses as much as digits as its factorization.

660760426826459 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1254113280, while the sum is 71.

The spelling of 660760426826459 in words is "six hundred sixty trillion, seven hundred sixty billion, four hundred twenty-six million, eight hundred twenty-six thousand, four hundred fifty-nine".