266666668 has 6 divisors (see below), whose sum is σ = 466666676. Its totient is φ = 133333332.

The previous prime is 266666657. The next prime is 266666671. The reversal of 266666668 is 866666662.

It is a happy number.

266666668 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-4 number, since 4×266666668⁴ (a number of 35 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a plaindrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33333330 + ... + 33333337.

Almost surely, 2^266666668 is an apocalyptic number.

It is an amenable number.

266666668 is a deficient number, since it is larger than the sum of its proper divisors (200000008).

266666668 is a wasteful number, since it uses less digits than its factorization.

266666668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66666671 (or 66666669 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 52.

The square root of 266666668 is about 16329.9316593793. The cubic root of 266666668 is about 643.6595908099.

The spelling of 266666668 in words is "two hundred sixty-six million, six hundred sixty-six thousand, six hundred sixty-eight".