1966126066613 has 2 divisors, whose sum is σ = 1966126066614. Its totient is φ = 1966126066612.

The previous prime is 1966126066523. The next prime is 1966126066631. The reversal of 1966126066613 is 3166606216691.

It is a happy number.

Together with next prime (1966126066631) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1453295347729 + 512830718884 = 1205527^2 + 716122^2 .

It is a cyclic number.

It is not a de Polignac number, because 1966126066613 - 2⁸ = 1966126066357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1966126062613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 983063033306 + 983063033307.

It is an arithmetic number, because the mean of its divisors is an integer number (983063033307).

Almost surely, 2^{1966126066613} is an apocalyptic number.

It is an amenable number.

1966126066613 is a deficient number, since it is larger than the sum of its proper divisors (1).

1966126066613 is an equidigital number, since it uses as much as digits as its factorization.

1966126066613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2519424, while the sum is 53.

The spelling of 1966126066613 in words is "one trillion, nine hundred sixty-six billion, one hundred twenty-six million, sixty-six thousand, six hundred thirteen".