6656505523 has 2 divisors, whose sum is σ = 6656505524. Its totient is φ = 6656505522.

The previous prime is 6656505497. The next prime is 6656505547. The reversal of 6656505523 is 3255056566.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6656505523 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6656505523.

It is not a weakly prime, because it can be changed into another prime (6656505223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3328252761 + 3328252762.

It is an arithmetic number, because the mean of its divisors is an integer number (3328252762).

Almost surely, 2^6656505523 is an apocalyptic number.

6656505523 is a deficient number, since it is larger than the sum of its proper divisors (1).

6656505523 is an equidigital number, since it uses as much as digits as its factorization.

6656505523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 810000, while the sum is 43.

The square root of 6656505523 is about 81587.4103216912. The cubic root of 6656505523 is about 1881.1153713174.

The spelling of 6656505523 in words is "six billion, six hundred fifty-six million, five hundred five thousand, five hundred twenty-three".