26666962813 has 2 divisors, whose sum is σ = 26666962814. Its totient is φ = 26666962812.

The previous prime is 26666962811. The next prime is 26666962831. The reversal of 26666962813 is 31826966662.

Together with next prime (26666962831) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15789932964 + 10877029849 = 125658^2 + 104293^2 .

It is a cyclic number.

It is not a de Polignac number, because 26666962813 - 2¹ = 26666962811 is a prime.

It is a super-2 number, since 2×26666962813² (a number of 22 digits) contains 22 as substring.

Together with 26666962811, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26666962811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13333481406 + 13333481407.

It is an arithmetic number, because the mean of its divisors is an integer number (13333481407).

Almost surely, 2^26666962813 is an apocalyptic number.

It is an amenable number.

26666962813 is a deficient number, since it is larger than the sum of its proper divisors (1).

26666962813 is an equidigital number, since it uses as much as digits as its factorization.

26666962813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6718464, while the sum is 55.

The spelling of 26666962813 in words is "twenty-six billion, six hundred sixty-six million, nine hundred sixty-two thousand, eight hundred thirteen".