6501063661 has 24 divisors (see below), whose sum is σ = 7109199360. Its totient is φ = 5931626400.

The previous prime is 6501063637. The next prime is 6501063677. The reversal of 6501063661 is 1663601056.

6501063661 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6501063661 - 2⁵ = 6501063629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6501069661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1660296 + ... + 1664206.

It is an arithmetic number, because the mean of its divisors is an integer number (296216640).

Almost surely, 2^6501063661 is an apocalyptic number.

It is an amenable number.

6501063661 is a deficient number, since it is larger than the sum of its proper divisors (608135699).

6501063661 is a wasteful number, since it uses less digits than its factorization.

6501063661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4057 (or 4014 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 6501063661 is about 80629.1737586340. The cubic root of 6501063661 is about 1866.3573709730.

The spelling of 6501063661 in words is "six billion, five hundred one million, sixty-three thousand, six hundred sixty-one".