6426620009 has 2 divisors, whose sum is σ = 6426620010. Its totient is φ = 6426620008.

The previous prime is 6426619963. The next prime is 6426620051. The reversal of 6426620009 is 9000266246.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4988314384 + 1438305625 = 70628^2 + 37925^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6426620009 is a prime.

It is not a weakly prime, because it can be changed into another prime (6426620069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3213310004 + 3213310005.

It is an arithmetic number, because the mean of its divisors is an integer number (3213310005).

Almost surely, 2^6426620009 is an apocalyptic number.

It is an amenable number.

6426620009 is a deficient number, since it is larger than the sum of its proper divisors (1).

6426620009 is an equidigital number, since it uses as much as digits as its factorization.

6426620009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 6426620009 is about 80166.2024109911. The cubic root of 6426620009 is about 1859.2061213958.

The spelling of 6426620009 in words is "six billion, four hundred twenty-six million, six hundred twenty thousand, nine".