1266623530867 has 2 divisors, whose sum is σ = 1266623530868. Its totient is φ = 1266623530866.

The previous prime is 1266623530819. The next prime is 1266623530933. The reversal of 1266623530867 is 7680353266621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1266623530867 - 2²⁷ = 1266489313139 is a prime.

It is a super-2 number, since 2×1266623530867² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1266623530817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633311765433 + 633311765434.

It is an arithmetic number, because the mean of its divisors is an integer number (633311765434).

Almost surely, 2^{1266623530867} is an apocalyptic number.

1266623530867 is a deficient number, since it is larger than the sum of its proper divisors (1).

1266623530867 is an equidigital number, since it uses as much as digits as its factorization.

1266623530867 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13063680, while the sum is 55.

The spelling of 1266623530867 in words is "one trillion, two hundred sixty-six billion, six hundred twenty-three million, five hundred thirty thousand, eight hundred sixty-seven".