662735609 has 2 divisors, whose sum is σ = 662735610. Its totient is φ = 662735608.

The previous prime is 662735539. The next prime is 662735611. The reversal of 662735609 is 906537266.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 633629584 + 29106025 = 25172^2 + 5395^2 .

It is a cyclic number.

It is not a de Polignac number, because 662735609 - 2¹² = 662731513 is a prime.

It is a Sophie Germain prime.

Together with 662735611, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 662735609.

It is not a weakly prime, because it can be changed into another prime (662735309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331367804 + 331367805.

It is an arithmetic number, because the mean of its divisors is an integer number (331367805).

Almost surely, 2^662735609 is an apocalyptic number.

It is an amenable number.

662735609 is a deficient number, since it is larger than the sum of its proper divisors (1).

662735609 is an equidigital number, since it uses as much as digits as its factorization.

662735609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 408240, while the sum is 44.

The square root of 662735609 is about 25743.6518194292. The cubic root of 662735609 is about 871.8600311386.

The spelling of 662735609 in words is "six hundred sixty-two million, seven hundred thirty-five thousand, six hundred nine".