266675723497 has 2 divisors, whose sum is σ = 266675723498. Its totient is φ = 266675723496.

The previous prime is 266675723491. The next prime is 266675723533. The reversal of 266675723497 is 794327576662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 266540908176 + 134815321 = 516276^2 + 11611^2 .

It is a cyclic number.

It is not a de Polignac number, because 266675723497 - 2¹⁹ = 266675199209 is a prime.

It is a super-2 number, since 2×266675723497² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (266675723491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133337861748 + 133337861749.

It is an arithmetic number, because the mean of its divisors is an integer number (133337861749).

Almost surely, 2^266675723497 is an apocalyptic number.

It is an amenable number.

266675723497 is a deficient number, since it is larger than the sum of its proper divisors (1).

266675723497 is an equidigital number, since it uses as much as digits as its factorization.

266675723497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 160030080, while the sum is 64.

The spelling of 266675723497 in words is "two hundred sixty-six billion, six hundred seventy-five million, seven hundred twenty-three thousand, four hundred ninety-seven".