266041204206545 has 8 divisors (see below), whose sum is σ = 338028824168424. Its totient is φ = 200313377284864.

The previous prime is 266041204206521. The next prime is 266041204206551. The reversal of 266041204206545 is 545602402140662.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 44446808920336 + 221594395286209 = 6666844^2 + 14886047^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 266041204206545 - 2¹⁰ = 266041204205521 is a prime.

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 266041204206545.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1564948259954 + ... + 1564948260123.

It is an arithmetic number, because the mean of its divisors is an integer number (42253603021053).

Almost surely, 2^{266041204206545} is an apocalyptic number.

It is an amenable number.

266041204206545 is a deficient number, since it is larger than the sum of its proper divisors (71987619961879).

266041204206545 is a wasteful number, since it uses less digits than its factorization.

266041204206545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3129896520099.

The product of its (nonzero) digits is 2764800, while the sum is 47.

The spelling of 266041204206545 in words is "two hundred sixty-six trillion, forty-one billion, two hundred four million, two hundred six thousand, five hundred forty-five".