26663345413 has 2 divisors, whose sum is σ = 26663345414. Its totient is φ = 26663345412.

The previous prime is 26663345399. The next prime is 26663345453. The reversal of 26663345413 is 31454336662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17141879329 + 9521466084 = 130927^2 + 97578^2 .

It is a cyclic number.

It is not a de Polignac number, because 26663345413 - 2¹³ = 26663337221 is a prime.

It is a super-2 number, since 2×26663345413² (a number of 22 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 26663345413.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26663345453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13331672706 + 13331672707.

It is an arithmetic number, because the mean of its divisors is an integer number (13331672707).

Almost surely, 2^26663345413 is an apocalyptic number.

It is an amenable number.

26663345413 is a deficient number, since it is larger than the sum of its proper divisors (1).

26663345413 is an equidigital number, since it uses as much as digits as its factorization.

26663345413 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 43.

The spelling of 26663345413 in words is "twenty-six billion, six hundred sixty-three million, three hundred forty-five thousand, four hundred thirteen".