662266446641 has 2 divisors, whose sum is σ = 662266446642. Its totient is φ = 662266446640.

The previous prime is 662266446637. The next prime is 662266446671. The reversal of 662266446641 is 146644662266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 437841596416 + 224424850225 = 661696^2 + 473735^2 .

It is a cyclic number.

It is not a de Polignac number, because 662266446641 - 2² = 662266446637 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (662266446671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331133223320 + 331133223321.

It is an arithmetic number, because the mean of its divisors is an integer number (331133223321).

Almost surely, 2^662266446641 is an apocalyptic number.

It is an amenable number.

662266446641 is a deficient number, since it is larger than the sum of its proper divisors (1).

662266446641 is an equidigital number, since it uses as much as digits as its factorization.

662266446641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11943936, while the sum is 53.

The spelling of 662266446641 in words is "six hundred sixty-two billion, two hundred sixty-six million, four hundred forty-six thousand, six hundred forty-one".