22740026666521 has 2 divisors, whose sum is σ = 22740026666522. Its totient is φ = 22740026666520.

The previous prime is 22740026666519. The next prime is 22740026666549. The reversal of 22740026666521 is 12566662004722.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17660123736025 + 5079902930496 = 4202395^2 + 2253864^2 .

It is a cyclic number.

It is not a de Polignac number, because 22740026666521 - 2¹ = 22740026666519 is a prime.

Together with 22740026666519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (22740026666921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11370013333260 + 11370013333261.

It is an arithmetic number, because the mean of its divisors is an integer number (11370013333261).

Almost surely, 2^{22740026666521} is an apocalyptic number.

It is an amenable number.

22740026666521 is a deficient number, since it is larger than the sum of its proper divisors (1).

22740026666521 is an equidigital number, since it uses as much as digits as its factorization.

22740026666521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2903040, while the sum is 49.

The spelling of 22740026666521 in words is "twenty-two trillion, seven hundred forty billion, twenty-six million, six hundred sixty-six thousand, five hundred twenty-one".