266666671 has 2 divisors, whose sum is σ = 266666672. Its totient is φ = 266666670.

The previous prime is 266666657. The next prime is 266666723. The reversal of 266666671 is 176666662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 266666671 - 2¹³ = 266658479 is a prime.

It is a super-2 number, since 2×266666671² = 142222226844444482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266666171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133333335 + 133333336.

It is an arithmetic number, because the mean of its divisors is an integer number (133333336).

Almost surely, 2^266666671 is an apocalyptic number.

266666671 is a deficient number, since it is larger than the sum of its proper divisors (1).

266666671 is an equidigital number, since it uses as much as digits as its factorization.

266666671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 46.

The square root of 266666671 is about 16329.9317512352. The cubic root of 266666671 is about 643.6595932236.

Subtracting from 266666671 its reverse (176666662), we obtain a palindrome (90000009).

The spelling of 266666671 in words is "two hundred sixty-six million, six hundred sixty-six thousand, six hundred seventy-one".