26662198579 has 2 divisors, whose sum is σ = 26662198580. Its totient is φ = 26662198578.

The previous prime is 26662198573. The next prime is 26662198639. The reversal of 26662198579 is 97589126662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26662198579 - 2¹⁵ = 26662165811 is a prime.

It is not a weakly prime, because it can be changed into another prime (26662198573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13331099289 + 13331099290.

It is an arithmetic number, because the mean of its divisors is an integer number (13331099290).

Almost surely, 2^26662198579 is an apocalyptic number.

26662198579 is a deficient number, since it is larger than the sum of its proper divisors (1).

26662198579 is an equidigital number, since it uses as much as digits as its factorization.

26662198579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19595520, while the sum is 61.

The spelling of 26662198579 in words is "twenty-six billion, six hundred sixty-two million, one hundred ninety-eight thousand, five hundred seventy-nine".