266664440407007 has 2 divisors, whose sum is σ = 266664440407008. Its totient is φ = 266664440407006.

The previous prime is 266664440406829. The next prime is 266664440407021. The reversal of 266664440407007 is 700704044466662.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 266664440407007 - 2¹⁰ = 266664440405983 is a prime.

It is a super-2 number, since 2×266664440407007² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266664440407907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133332220203503 + 133332220203504.

It is an arithmetic number, because the mean of its divisors is an integer number (133332220203504).

Almost surely, 2^{266664440407007} is an apocalyptic number.

266664440407007 is a deficient number, since it is larger than the sum of its proper divisors (1).

266664440407007 is an equidigital number, since it uses as much as digits as its factorization.

266664440407007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32514048, while the sum is 56.

The spelling of 266664440407007 in words is "two hundred sixty-six trillion, six hundred sixty-four billion, four hundred forty million, four hundred seven thousand, seven".