26514665669 has 2 divisors, whose sum is σ = 26514665670. Its totient is φ = 26514665668.

The previous prime is 26514665647. The next prime is 26514665741. The reversal of 26514665669 is 96656641562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14907189025 + 11607476644 = 122095^2 + 107738^2 .

It is a cyclic number.

It is not a de Polignac number, because 26514665669 - 2⁸ = 26514665413 is a prime.

It is a super-2 number, since 2×26514665669² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26514655669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13257332834 + 13257332835.

It is an arithmetic number, because the mean of its divisors is an integer number (13257332835).

Almost surely, 2^26514665669 is an apocalyptic number.

It is an amenable number.

26514665669 is a deficient number, since it is larger than the sum of its proper divisors (1).

26514665669 is an equidigital number, since it uses as much as digits as its factorization.

26514665669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13996800, while the sum is 56.

The spelling of 26514665669 in words is "twenty-six billion, five hundred fourteen million, six hundred sixty-five thousand, six hundred sixty-nine".