266773016765 has 16 divisors (see below), whose sum is σ = 321726720000. Its totient is φ = 212353322112.

The previous prime is 266773016759. The next prime is 266773016773. The reversal of 266773016765 is 567610377662.

It is a cyclic number.

It is not a de Polignac number, because 266773016765 - 2²⁴ = 266756239549 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 266773016765.

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, 2169041 + ... + 2288729.

It is an arithmetic number, because the mean of its divisors is an integer number (20107920000).

Almost surely, 2^266773016765 is an apocalyptic number.

It is an amenable number.

266773016765 is a deficient number, since it is larger than the sum of its proper divisors (54953703235).

266773016765 is a wasteful number, since it uses less digits than its factorization.

266773016765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121916.

The product of its (nonzero) digits is 13335840, while the sum is 56.

The spelling of 266773016765 in words is "two hundred sixty-six billion, seven hundred seventy-three million, sixteen thousand, seven hundred sixty-five".