1266878033 has 2 divisors, whose sum is σ = 1266878034. Its totient is φ = 1266878032.

The previous prime is 1266878017. The next prime is 1266878057. The reversal of 1266878033 is 3308786621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1266861649 + 16384 = 35593^2 + 128^2 .

It is a cyclic number.

It is not a de Polignac number, because 1266878033 - 2⁴ = 1266878017 is a prime.

It is not a weakly prime, because it can be changed into another prime (1266878003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633439016 + 633439017.

It is an arithmetic number, because the mean of its divisors is an integer number (633439017).

Almost surely, 2^1266878033 is an apocalyptic number.

It is an amenable number.

1266878033 is a deficient number, since it is larger than the sum of its proper divisors (1).

1266878033 is an equidigital number, since it uses as much as digits as its factorization.

1266878033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 44.

The square root of 1266878033 is about 35593.2301568711. The cubic root of 1266878033 is about 1082.0440350603.

The spelling of 1266878033 in words is "one billion, two hundred sixty-six million, eight hundred seventy-eight thousand, thirty-three".