266005667 has 2 divisors, whose sum is σ = 266005668. Its totient is φ = 266005666.

The previous prime is 266005627. The next prime is 266005687. The reversal of 266005667 is 766500662.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-266005667 is a prime.

It is a super-5 number, since 5×266005667⁵ (a number of 43 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 266005667.

It is not a weakly prime, because it can be changed into another prime (266005627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133002833 + 133002834.

It is an arithmetic number, because the mean of its divisors is an integer number (133002834).

Almost surely, 2^266005667 is an apocalyptic number.

266005667 is a deficient number, since it is larger than the sum of its proper divisors (1).

266005667 is an equidigital number, since it uses as much as digits as its factorization.

266005667 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 266005667 is about 16309.6801624066. The cubic root of 266005667 is about 643.1273262442.

The spelling of 266005667 in words is "two hundred sixty-six million, five thousand, six hundred sixty-seven".