266666666 has 32 divisors (see below), whose sum is σ = 469169280. Its totient is φ = 111315456.

The previous prime is 266666657. The next prime is 266666671. The reversal of 266666666 is 666666662.

266666666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×266666666² = 142222221511111112, which contains 22 as substring.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

266666666 is a modest number, since divided by 66666 gives 2666 as remainder.

It is a plaindrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91910 + ... + 94766.

It is an arithmetic number, because the mean of its divisors is an integer number (14661540).

Almost surely, 2^266666666 is an apocalyptic number.

266666666 is a deficient number, since it is larger than the sum of its proper divisors (202502614).

266666666 is a wasteful number, since it uses less digits than its factorization.

266666666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3038.

The product of its digits is 3359232, while the sum is 50.

The square root of 266666666 is about 16329.9315981421. The cubic root of 266666666 is about 643.6595892007.

The spelling of 266666666 in words is "two hundred sixty-six million, six hundred sixty-six thousand, six hundred sixty-six".