266662370449 has 2 divisors, whose sum is σ = 266662370450. Its totient is φ = 266662370448.

The previous prime is 266662370423. The next prime is 266662370483. The reversal of 266662370449 is 944073266662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 266661730449 + 640000 = 516393^2 + 800^2 .

It is a cyclic number.

It is not a de Polignac number, because 266662370449 - 2¹⁵ = 266662337681 is a prime.

It is a super-2 number, since 2×266662370449² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 266662370449.

It is not a weakly prime, because it can be changed into another prime (266662370749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133331185224 + 133331185225.

It is an arithmetic number, because the mean of its divisors is an integer number (133331185225).

Almost surely, 2^266662370449 is an apocalyptic number.

It is an amenable number.

266662370449 is a deficient number, since it is larger than the sum of its proper divisors (1).

266662370449 is an equidigital number, since it uses as much as digits as its factorization.

266662370449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15676416, while the sum is 55.

The spelling of 266662370449 in words is "two hundred sixty-six billion, six hundred sixty-two million, three hundred seventy thousand, four hundred forty-nine".