266523320977 has 2 divisors, whose sum is σ = 266523320978. Its totient is φ = 266523320976.

The previous prime is 266523320951. The next prime is 266523321007. The reversal of 266523320977 is 779023325662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 179063539281 + 87459781696 = 423159^2 + 295736^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-266523320977 is a prime.

It is not a weakly prime, because it can be changed into another prime (266523327977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133261660488 + 133261660489.

It is an arithmetic number, because the mean of its divisors is an integer number (133261660489).

Almost surely, 2^266523320977 is an apocalyptic number.

It is an amenable number.

266523320977 is a deficient number, since it is larger than the sum of its proper divisors (1).

266523320977 is an equidigital number, since it uses as much as digits as its factorization.

266523320977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5715360, while the sum is 52.

The spelling of 266523320977 in words is "two hundred sixty-six billion, five hundred twenty-three million, three hundred twenty thousand, nine hundred seventy-seven".