266687228566 has 16 divisors (see below), whose sum is σ = 436440892608. Its totient is φ = 121209353800.

The previous prime is 266687228531. The next prime is 266687228597. The reversal of 266687228566 is 665822786662.

266687228566 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×266687228566² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 266687228498 and 266687228507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 378640 + ... + 822643.

It is an arithmetic number, because the mean of its divisors is an integer number (27277555788).

Almost surely, 2^266687228566 is an apocalyptic number.

266687228566 is a deficient number, since it is larger than the sum of its proper divisors (169753664042).

266687228566 is a wasteful number, since it uses less digits than its factorization.

266687228566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1211387.

The product of its digits is 139345920, while the sum is 64.

The spelling of 266687228566 in words is "two hundred sixty-six billion, six hundred eighty-seven million, two hundred twenty-eight thousand, five hundred sixty-six".