6650101561 has 2 divisors, whose sum is σ = 6650101562. Its totient is φ = 6650101560.

The previous prime is 6650101529. The next prime is 6650101571. The reversal of 6650101561 is 1651010566.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6279770025 + 370331536 = 79245^2 + 19244^2 .

It is a cyclic number.

It is not a de Polignac number, because 6650101561 - 2⁵ = 6650101529 is a prime.

It is a super-2 number, since 2×6650101561² = 88447701543229273442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6650101571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3325050780 + 3325050781.

It is an arithmetic number, because the mean of its divisors is an integer number (3325050781).

Almost surely, 2^6650101561 is an apocalyptic number.

It is an amenable number.

6650101561 is a deficient number, since it is larger than the sum of its proper divisors (1).

6650101561 is an equidigital number, since it uses as much as digits as its factorization.

6650101561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 6650101561 is about 81548.1548595675. The cubic root of 6650101561 is about 1880.5119287371.

The spelling of 6650101561 in words is "six billion, six hundred fifty million, one hundred one thousand, five hundred sixty-one".