43211366663 has 2 divisors, whose sum is σ = 43211366664. Its totient is φ = 43211366662.

The previous prime is 43211366659. The next prime is 43211366687. The reversal of 43211366663 is 36666311234.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43211366663 - 2² = 43211366659 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43211366663.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43211366603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21605683331 + 21605683332.

It is an arithmetic number, because the mean of its divisors is an integer number (21605683332).

Almost surely, 2^43211366663 is an apocalyptic number.

43211366663 is a deficient number, since it is larger than the sum of its proper divisors (1).

43211366663 is an equidigital number, since it uses as much as digits as its factorization.

43211366663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 279936, while the sum is 41.

Adding to 43211366663 its reverse (36666311234), we get a palindrome (79877677897).

The spelling of 43211366663 in words is "forty-three billion, two hundred eleven million, three hundred sixty-six thousand, six hundred sixty-three".