26660815211 has 2 divisors, whose sum is σ = 26660815212. Its totient is φ = 26660815210.

The previous prime is 26660815187. The next prime is 26660815277. The reversal of 26660815211 is 11251806662.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26660815211 is a prime.

It is not a weakly prime, because it can be changed into another prime (26660875211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13330407605 + 13330407606.

It is an arithmetic number, because the mean of its divisors is an integer number (13330407606).

Almost surely, 2^26660815211 is an apocalyptic number.

26660815211 is a deficient number, since it is larger than the sum of its proper divisors (1).

26660815211 is an equidigital number, since it uses as much as digits as its factorization.

26660815211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 38.

The spelling of 26660815211 in words is "twenty-six billion, six hundred sixty million, eight hundred fifteen thousand, two hundred eleven".