266722962641 has 2 divisors, whose sum is σ = 266722962642. Its totient is φ = 266722962640.

The previous prime is 266722962601. The next prime is 266722962703. The reversal of 266722962641 is 146269227662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 227490841600 + 39232121041 = 476960^2 + 198071^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-266722962641 is a prime.

It is a super-2 number, since 2×266722962641² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (266722962601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133361481320 + 133361481321.

It is an arithmetic number, because the mean of its divisors is an integer number (133361481321).

Almost surely, 2^266722962641 is an apocalyptic number.

It is an amenable number.

266722962641 is a deficient number, since it is larger than the sum of its proper divisors (1).

266722962641 is an equidigital number, since it uses as much as digits as its factorization.

266722962641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5225472, while the sum is 53.

The spelling of 266722962641 in words is "two hundred sixty-six billion, seven hundred twenty-two million, nine hundred sixty-two thousand, six hundred forty-one".