66344265434999 has 2 divisors, whose sum is σ = 66344265435000. Its totient is φ = 66344265434998.

The previous prime is 66344265434977. The next prime is 66344265435079. The reversal of 66344265434999 is 99943456244366.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66344265434999 - 2⁴⁴ = 48752079390583 is a prime.

It is a super-2 number, since 2×66344265434999² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66344265434599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33172132717499 + 33172132717500.

It is an arithmetic number, because the mean of its divisors is an integer number (33172132717500).

Almost surely, 2^{66344265434999} is an apocalyptic number.

66344265434999 is a deficient number, since it is larger than the sum of its proper divisors (1).

66344265434999 is an equidigital number, since it uses as much as digits as its factorization.

66344265434999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3627970560, while the sum is 74.

The spelling of 66344265434999 in words is "sixty-six trillion, three hundred forty-four billion, two hundred sixty-five million, four hundred thirty-four thousand, nine hundred ninety-nine".