26223196661 has 2 divisors, whose sum is σ = 26223196662. Its totient is φ = 26223196660.

The previous prime is 26223196619. The next prime is 26223196667. The reversal of 26223196661 is 16669132262.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21120808900 + 5102387761 = 145330^2 + 71431^2 .

It is a cyclic number.

It is not a de Polignac number, because 26223196661 - 2²² = 26219002357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26223196667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13111598330 + 13111598331.

It is an arithmetic number, because the mean of its divisors is an integer number (13111598331).

Almost surely, 2^26223196661 is an apocalyptic number.

It is an amenable number.

26223196661 is a deficient number, since it is larger than the sum of its proper divisors (1).

26223196661 is an equidigital number, since it uses as much as digits as its factorization.

26223196661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 44.

The spelling of 26223196661 in words is "twenty-six billion, two hundred twenty-three million, one hundred ninety-six thousand, six hundred sixty-one".