670000406809 has 2 divisors, whose sum is σ = 670000406810. Its totient is φ = 670000406808.

The previous prime is 670000406797. The next prime is 670000406821. The reversal of 670000406809 is 908604000076.

It is a balanced prime because it is at equal distance from previous prime (670000406797) and next prime (670000406821).

It can be written as a sum of positive squares in only one way, i.e., 669835849225 + 164557584 = 818435^2 + 12828^2 .

It is a cyclic number.

It is not a de Polignac number, because 670000406809 - 2¹¹ = 670000404761 is a prime.

It is not a weakly prime, because it can be changed into another prime (670000406849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335000203404 + 335000203405.

It is an arithmetic number, because the mean of its divisors is an integer number (335000203405).

Almost surely, 2^670000406809 is an apocalyptic number.

It is an amenable number.

670000406809 is a deficient number, since it is larger than the sum of its proper divisors (1).

670000406809 is an equidigital number, since it uses as much as digits as its factorization.

670000406809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 40.

The spelling of 670000406809 in words is "six hundred seventy billion, four hundred six thousand, eight hundred nine".