6651560009 has 2 divisors, whose sum is σ = 6651560010. Its totient is φ = 6651560008.

The previous prime is 6651559997. The next prime is 6651560017. The reversal of 6651560009 is 9000651566.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6079632784 + 571927225 = 77972^2 + 23915^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6651560009 is a prime.

It is not a weakly prime, because it can be changed into another prime (6651560609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3325780004 + 3325780005.

It is an arithmetic number, because the mean of its divisors is an integer number (3325780005).

Almost surely, 2^6651560009 is an apocalyptic number.

It is an amenable number.

6651560009 is a deficient number, since it is larger than the sum of its proper divisors (1).

6651560009 is an equidigital number, since it uses as much as digits as its factorization.

6651560009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48600, while the sum is 38.

The square root of 6651560009 is about 81557.0966194849. The cubic root of 6651560009 is about 1880.6493917199.

The spelling of 6651560009 in words is "six billion, six hundred fifty-one million, five hundred sixty thousand, nine".