6608621651 has 2 divisors, whose sum is σ = 6608621652. Its totient is φ = 6608621650.

The previous prime is 6608621647. The next prime is 6608621693. The reversal of 6608621651 is 1561268066.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6608621651 - 2² = 6608621647 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6608621599 and 6608621608.

It is not a weakly prime, because it can be changed into another prime (6608621051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3304310825 + 3304310826.

It is an arithmetic number, because the mean of its divisors is an integer number (3304310826).

Almost surely, 2^6608621651 is an apocalyptic number.

6608621651 is a deficient number, since it is larger than the sum of its proper divisors (1).

6608621651 is an equidigital number, since it uses as much as digits as its factorization.

6608621651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 6608621651 is about 81293.4293224243. The cubic root of 6608621651 is about 1876.5938827237.

The spelling of 6608621651 in words is "six billion, six hundred eight million, six hundred twenty-one thousand, six hundred fifty-one".