266663564424265 has 8 divisors (see below), whose sum is σ = 326033942919048. Its totient is φ = 209305741132800.

The previous prime is 266663564424227. The next prime is 266663564424289. The reversal of 266663564424265 is 562424465366662.

It can be written as a sum of positive squares in 4 ways, for example, as 15912950722816 + 250750613701449 = 3989104^2 + 15835107^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 266663564424265 - 2¹⁹ = 266663563899977 is a prime.

It is a super-2 number, since 2×266663564424265² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 266663564424265.

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, 503138800536 + ... + 503138801065.

It is an arithmetic number, because the mean of its divisors is an integer number (40754242864881).

Almost surely, 2^{266663564424265} is an apocalyptic number.

It is an amenable number.

266663564424265 is a deficient number, since it is larger than the sum of its proper divisors (59370378494783).

266663564424265 is a wasteful number, since it uses less digits than its factorization.

266663564424265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006277601659.

The product of its digits is 1791590400, while the sum is 67.

The spelling of 266663564424265 in words is "two hundred sixty-six trillion, six hundred sixty-three billion, five hundred sixty-four million, four hundred twenty-four thousand, two hundred sixty-five".