10661568523 has 2 divisors, whose sum is σ = 10661568524. Its totient is φ = 10661568522.

The previous prime is 10661568517. The next prime is 10661568583. The reversal of 10661568523 is 32586516601.

10661568523 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10661568523 - 2²⁵ = 10628014091 is a prime.

It is a super-2 number, since 2×10661568523² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10661568523.

It is not a weakly prime, because it can be changed into another prime (10661568503) 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, 5330784261 + 5330784262.

It is an arithmetic number, because the mean of its divisors is an integer number (5330784262).

Almost surely, 2^10661568523 is an apocalyptic number.

10661568523 is a deficient number, since it is larger than the sum of its proper divisors (1).

10661568523 is an equidigital number, since it uses as much as digits as its factorization.

10661568523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 259200, while the sum is 43.

The spelling of 10661568523 in words is "ten billion, six hundred sixty-one million, five hundred sixty-eight thousand, five hundred twenty-three".