266343001456639 has 2 divisors, whose sum is σ = 266343001456640. Its totient is φ = 266343001456638.

The previous prime is 266343001456559. The next prime is 266343001456661. The reversal of 266343001456639 is 936654100343662.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 266343001456639 - 2²¹ = 266342999359487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266343001450639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (37) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133171500728319 + 133171500728320.

It is an arithmetic number, because the mean of its divisors is an integer number (133171500728320).

Almost surely, 2^{266343001456639} is an apocalyptic number.

266343001456639 is a deficient number, since it is larger than the sum of its proper divisors (1).

266343001456639 is an equidigital number, since it uses as much as digits as its factorization.

266343001456639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50388480, while the sum is 58.

The spelling of 266343001456639 in words is "two hundred sixty-six trillion, three hundred forty-three billion, one million, four hundred fifty-six thousand, six hundred thirty-nine".