266687387285 has 16 divisors (see below), whose sum is σ = 364297080960. Its totient is φ = 185521659840.

The previous prime is 266687387269. The next prime is 266687387311. The reversal of 266687387285 is 582783786662.

It is a happy number.

It is not a de Polignac number, because 266687387285 - 2⁴ = 266687387269 is a prime.

It is a super-2 number, since 2×266687387285² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

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, 105408770 + ... + 105411299.

It is an arithmetic number, because the mean of its divisors is an integer number (22768567560).

Almost surely, 2^266687387285 is an apocalyptic number.

It is an amenable number.

266687387285 is a deficient number, since it is larger than the sum of its proper divisors (97609693675).

266687387285 is a wasteful number, since it uses less digits than its factorization.

266687387285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210820108.

The product of its digits is 325140480, while the sum is 68.

The spelling of 266687387285 in words is "two hundred sixty-six billion, six hundred eighty-seven million, three hundred eighty-seven thousand, two hundred eighty-five".