766327260221 has 2 divisors, whose sum is σ = 766327260222. Its totient is φ = 766327260220.

The previous prime is 766327260187. The next prime is 766327260233. The reversal of 766327260221 is 122062723667.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 614873971321 + 151453288900 = 784139^2 + 389170^2 .

It is a cyclic number.

It is not a de Polignac number, because 766327260221 - 2¹⁰ = 766327259197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (766327280221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383163630110 + 383163630111.

It is an arithmetic number, because the mean of its divisors is an integer number (383163630111).

Almost surely, 2^766327260221 is an apocalyptic number.

It is an amenable number.

766327260221 is a deficient number, since it is larger than the sum of its proper divisors (1).

766327260221 is an equidigital number, since it uses as much as digits as its factorization.

766327260221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 508032, while the sum is 44.

Adding to 766327260221 its reverse (122062723667), we get a palindrome (888389983888).

The spelling of 766327260221 in words is "seven hundred sixty-six billion, three hundred twenty-seven million, two hundred sixty thousand, two hundred twenty-one".