1266508667 has 2 divisors, whose sum is σ = 1266508668. Its totient is φ = 1266508666.

The previous prime is 1266508637. The next prime is 1266508681. The reversal of 1266508667 is 7668056621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1266508667 - 2¹⁶ = 1266443131 is a prime.

It is a super-2 number, since 2×1266508667² = 3208088407172233778, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1266508637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633254333 + 633254334.

It is an arithmetic number, because the mean of its divisors is an integer number (633254334).

Almost surely, 2^1266508667 is an apocalyptic number.

1266508667 is a deficient number, since it is larger than the sum of its proper divisors (1).

1266508667 is an equidigital number, since it uses as much as digits as its factorization.

1266508667 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 47.

The square root of 1266508667 is about 35588.0410671900. The cubic root of 1266508667 is about 1081.9388659977.

The spelling of 1266508667 in words is "one billion, two hundred sixty-six million, five hundred eight thousand, six hundred sixty-seven".