1266750125803 has 2 divisors, whose sum is σ = 1266750125804. Its totient is φ = 1266750125802.

The previous prime is 1266750125791. The next prime is 1266750125813. The reversal of 1266750125803 is 3085210576621.

It is a strong prime.

It is an emirp because it is prime and its reverse (3085210576621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1266750125803 - 2³⁷ = 1129311172331 is a prime.

It is not a weakly prime, because it can be changed into another prime (1266750125813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633375062901 + 633375062902.

It is an arithmetic number, because the mean of its divisors is an integer number (633375062902).

Almost surely, 2^{1266750125803} is an apocalyptic number.

1266750125803 is a deficient number, since it is larger than the sum of its proper divisors (1).

1266750125803 is an equidigital number, since it uses as much as digits as its factorization.

1266750125803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 604800, while the sum is 46.

The spelling of 1266750125803 in words is "one trillion, two hundred sixty-six billion, seven hundred fifty million, one hundred twenty-five thousand, eight hundred three".