266666666666666 has 16 divisors (see below), whose sum is σ = 457143360000000. Its totient is φ = 114285588571440.

The previous prime is 266666666666593. The next prime is 266666666666669. The reversal of 266666666666666 is 666666666666662.

It is a super-2 number, since 2×266666666666666² (a number of 30 digits) contains 22 as substring.

266666666666666 is a modest number, since divided by 66666666 gives 2666666 as remainder.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (266666666666669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3333335 + ... + 23333333.

It is an arithmetic number, because the mean of its divisors is an integer number (28571460000000).

Almost surely, 2^{266666666666666} is an apocalyptic number.

266666666666666 is a deficient number, since it is larger than the sum of its proper divisors (190476693333334).

266666666666666 is a wasteful number, since it uses less digits than its factorization.

266666666666666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20952389.

The product of its digits is 156728328192, while the sum is 86.

The spelling of 266666666666666 in words is "two hundred sixty-six trillion, six hundred sixty-six billion, six hundred sixty-six million, six hundred sixty-six thousand, six hundred sixty-six".