705662121641 has 2 divisors, whose sum is σ = 705662121642. Its totient is φ = 705662121640.

The previous prime is 705662121631. The next prime is 705662121679. The reversal of 705662121641 is 146121266507.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 652855920025 + 52806201616 = 807995^2 + 229796^2 .

It is an emirp because it is prime and its reverse (146121266507) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-705662121641 is a prime.

It is not a weakly prime, because it can be changed into another prime (705662121631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 352831060820 + 352831060821.

It is an arithmetic number, because the mean of its divisors is an integer number (352831060821).

Almost surely, 2^705662121641 is an apocalyptic number.

It is an amenable number.

705662121641 is a deficient number, since it is larger than the sum of its proper divisors (1).

705662121641 is an equidigital number, since it uses as much as digits as its factorization.

705662121641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 41.

The spelling of 705662121641 in words is "seven hundred five billion, six hundred sixty-two million, one hundred twenty-one thousand, six hundred forty-one".