6560621651 has 2 divisors, whose sum is σ = 6560621652. Its totient is φ = 6560621650.

The previous prime is 6560621593. The next prime is 6560621677. The reversal of 6560621651 is 1561260656.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6560621651 - 2²⁶ = 6493512787 is a prime.

It is not a weakly prime, because it can be changed into another prime (6560627651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3280310825 + 3280310826.

It is an arithmetic number, because the mean of its divisors is an integer number (3280310826).

Almost surely, 2^6560621651 is an apocalyptic number.

6560621651 is a deficient number, since it is larger than the sum of its proper divisors (1).

6560621651 is an equidigital number, since it uses as much as digits as its factorization.

6560621651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 6560621651 is about 80997.6644786749. The cubic root of 6560621651 is about 1872.0394547951.

The spelling of 6560621651 in words is "six billion, five hundred sixty million, six hundred twenty-one thousand, six hundred fifty-one".