26666135415013 has 8 divisors (see below), whose sum is σ = 26813671332696. Its totient is φ = 26518696089600.

The previous prime is 26666135414999. The next prime is 26666135415097. The reversal of 26666135415013 is 31051453166662.

It can be written as a sum of positive squares in 4 ways, for example, as 9271580435329 + 17394554979684 = 3044927^2 + 4170678^2 .

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 26666135415013 - 2⁵ = 26666135414981 is a prime.

It is a super-2 number, since 2×26666135415013² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26666135415613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23594368 + ... + 24698713.

It is an arithmetic number, because the mean of its divisors is an integer number (3351708916587).

Almost surely, 2^{26666135415013} is an apocalyptic number.

It is an amenable number.

26666135415013 is a deficient number, since it is larger than the sum of its proper divisors (147535917683).

26666135415013 is a wasteful number, since it uses less digits than its factorization.

26666135415013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48296135.

The product of its (nonzero) digits is 2332800, while the sum is 49.

The spelling of 26666135415013 in words is "twenty-six trillion, six hundred sixty-six billion, one hundred thirty-five million, four hundred fifteen thousand, thirteen".