1266866423 has 2 divisors, whose sum is σ = 1266866424. Its totient is φ = 1266866422.

The previous prime is 1266866417. The next prime is 1266866539. The reversal of 1266866423 is 3246686621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1266866423 - 2¹² = 1266862327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1266866413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633433211 + 633433212.

It is an arithmetic number, because the mean of its divisors is an integer number (633433212).

Almost surely, 2^1266866423 is an apocalyptic number.

1266866423 is a deficient number, since it is larger than the sum of its proper divisors (1).

1266866423 is an equidigital number, since it uses as much as digits as its factorization.

1266866423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 497664, while the sum is 44.

The square root of 1266866423 is about 35593.0670636853. The cubic root of 1266866423 is about 1082.0407296724.

The spelling of 1266866423 in words is "one billion, two hundred sixty-six million, eight hundred sixty-six thousand, four hundred twenty-three".