666244411713611 has 2 divisors, whose sum is σ = 666244411713612. Its totient is φ = 666244411713610.

The previous prime is 666244411713557. The next prime is 666244411713619. The reversal of 666244411713611 is 116317114442666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 666244411713611 - 2⁶ = 666244411713547 is a prime.

It is a super-2 number, since 2×666244411713611² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (666244411713619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333122205856805 + 333122205856806.

It is an arithmetic number, because the mean of its divisors is an integer number (333122205856806).

Almost surely, 2^{666244411713611} is an apocalyptic number.

666244411713611 is a deficient number, since it is larger than the sum of its proper divisors (1).

666244411713611 is an equidigital number, since it uses as much as digits as its factorization.

666244411713611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3483648, while the sum is 53.

The spelling of 666244411713611 in words is "six hundred sixty-six trillion, two hundred forty-four billion, four hundred eleven million, seven hundred thirteen thousand, six hundred eleven".