266666877 has 16 divisors (see below), whose sum is σ = 395324160. Its totient is φ = 177660000.

The previous prime is 266666863. The next prime is 266666909. The reversal of 266666877 is 778666662.

It is not a de Polignac number, because 266666877 - 2¹⁹ = 266142589 is a prime.

It is a super-2 number, since 2×266666877² = 142222446577866258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266666837) 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 in 15 ways as a sum of consecutive naturals, for example, 61377 + ... + 65577.

It is an arithmetic number, because the mean of its divisors is an integer number (24707760).

Almost surely, 2^266666877 is an apocalyptic number.

266666877 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

266666877 is a deficient number, since it is larger than the sum of its proper divisors (128657283).

266666877 is a wasteful number, since it uses less digits than its factorization.

266666877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6561 (or 6555 counting only the distinct ones).

The product of its digits is 6096384, while the sum is 54.

The square root of 266666877 is about 16329.9380586700. The cubic root of 266666877 is about 643.6597589659.

The spelling of 266666877 in words is "two hundred sixty-six million, six hundred sixty-six thousand, eight hundred seventy-seven".