75722666266021 has 2 divisors, whose sum is σ = 75722666266022. Its totient is φ = 75722666266020.

The previous prime is 75722666265991. The next prime is 75722666266213. The reversal of 75722666266021 is 12066266622757.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41463476937796 + 34259189328225 = 6439214^2 + 5853135^2 .

It is a cyclic number.

It is not a de Polignac number, because 75722666266021 - 2⁹ = 75722666265509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75722666266721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37861333133010 + 37861333133011.

It is an arithmetic number, because the mean of its divisors is an integer number (37861333133011).

Almost surely, 2^{75722666266021} is an apocalyptic number.

It is an amenable number.

75722666266021 is a deficient number, since it is larger than the sum of its proper divisors (1).

75722666266021 is an equidigital number, since it uses as much as digits as its factorization.

75722666266021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30481920, while the sum is 58.

The spelling of 75722666266021 in words is "seventy-five trillion, seven hundred twenty-two billion, six hundred sixty-six million, two hundred sixty-six thousand, twenty-one".