266661045226413 has 24 divisors (see below), whose sum is σ = 385310093224056. Its totient is φ = 177712641792000.

The previous prime is 266661045226397. The next prime is 266661045226421. The reversal of 266661045226413 is 314622540166662.

It can be written as a sum of positive squares in 4 ways, for example, as 437506842249 + 266223538384164 = 661443^2 + 16316358^2 .

It is not a de Polignac number, because 266661045226413 - 2⁴ = 266661045226397 is a prime.

It is a super-2 number, since 2×266661045226413² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 266661045226413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266661045226423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 356429853 + ... + 357177213.

It is an arithmetic number, because the mean of its divisors is an integer number (16054587217669).

Almost surely, 2^{266661045226413} is an apocalyptic number.

It is an amenable number.

266661045226413 is a deficient number, since it is larger than the sum of its proper divisors (118649047997643).

266661045226413 is a wasteful number, since it uses less digits than its factorization.

266661045226413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761005 (or 761002 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 54.

The spelling of 266661045226413 in words is "two hundred sixty-six trillion, six hundred sixty-one billion, forty-five million, two hundred twenty-six thousand, four hundred thirteen".