266560652651 has 2 divisors, whose sum is σ = 266560652652. Its totient is φ = 266560652650.

The previous prime is 266560652641. The next prime is 266560652669. The reversal of 266560652651 is 156256065662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 266560652651 - 2⁶ = 266560652587 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 266560652651.

It is not a weakly prime, because it can be changed into another prime (266560652641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133280326325 + 133280326326.

It is an arithmetic number, because the mean of its divisors is an integer number (133280326326).

Almost surely, 2^266560652651 is an apocalyptic number.

266560652651 is a deficient number, since it is larger than the sum of its proper divisors (1).

266560652651 is an equidigital number, since it uses as much as digits as its factorization.

266560652651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888000, while the sum is 50.

The spelling of 266560652651 in words is "two hundred sixty-six billion, five hundred sixty million, six hundred fifty-two thousand, six hundred fifty-one".