6640124653 has 2 divisors, whose sum is σ = 6640124654. Its totient is φ = 6640124652.

The previous prime is 6640124651. The next prime is 6640124657. The reversal of 6640124653 is 3564210466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6119463529 + 520661124 = 78227^2 + 22818^2 .

It is a cyclic number.

It is not a de Polignac number, because 6640124653 - 2¹ = 6640124651 is a prime.

Together with 6640124651, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6640124651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3320062326 + 3320062327.

It is an arithmetic number, because the mean of its divisors is an integer number (3320062327).

Almost surely, 2^6640124653 is an apocalyptic number.

It is an amenable number.

6640124653 is a deficient number, since it is larger than the sum of its proper divisors (1).

6640124653 is an equidigital number, since it uses as much as digits as its factorization.

6640124653 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 37.

The square root of 6640124653 is about 81486.9600181526. The cubic root of 6640124653 is about 1879.5710365988.

The spelling of 6640124653 in words is "six billion, six hundred forty million, one hundred twenty-four thousand, six hundred fifty-three".