6653643065 has 4 divisors (see below), whose sum is σ = 7984371684. Its totient is φ = 5322914448.

The previous prime is 6653643053. The next prime is 6653643077. The reversal of 6653643065 is 5603463566.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (6653643053) and next prime (6653643077).

It can be written as a sum of positive squares in 2 ways, for example, as 4165927936 + 2487715129 = 64544^2 + 49877^2 .

It is a cyclic number.

It is not a de Polignac number, because 6653643065 - 2⁶ = 6653643001 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 665364302 + ... + 665364311.

It is an arithmetic number, because the mean of its divisors is an integer number (1996092921).

Almost surely, 2^6653643065 is an apocalyptic number.

It is an amenable number.

6653643065 is a deficient number, since it is larger than the sum of its proper divisors (1330728619).

6653643065 is a wasteful number, since it uses less digits than its factorization.

6653643065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1330728618.

The product of its (nonzero) digits is 1166400, while the sum is 44.

The square root of 6653643065 is about 81569.8661577914. The cubic root of 6653643065 is about 1880.8456909900.

The spelling of 6653643065 in words is "six billion, six hundred fifty-three million, six hundred forty-three thousand, sixty-five".