266767665065 has 16 divisors (see below), whose sum is σ = 351735531840. Its totient is φ = 192617065920.

The previous prime is 266767665023. The next prime is 266767665067. The reversal of 266767665065 is 560566767662.

It is a happy number.

It is not a de Polignac number, because 266767665065 - 2²⁸ = 266499229609 is a prime.

It is a super-3 number, since 3×266767665065³ (a number of 35 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 266767664989 and 266767665007.

It is not an unprimeable number, because it can be changed into a prime (266767665067) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17439554 + ... + 17454843.

It is an arithmetic number, because the mean of its divisors is an integer number (21983470740).

Almost surely, 2^266767665065 is an apocalyptic number.

It is an amenable number.

266767665065 is a deficient number, since it is larger than the sum of its proper divisors (84967866775).

266767665065 is a wasteful number, since it uses less digits than its factorization.

266767665065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34894552.

The product of its (nonzero) digits is 114307200, while the sum is 62.

The spelling of 266767665065 in words is "two hundred sixty-six billion, seven hundred sixty-seven million, six hundred sixty-five thousand, sixty-five".