668013534247 has 2 divisors, whose sum is σ = 668013534248. Its totient is φ = 668013534246.

The previous prime is 668013534239. The next prime is 668013534283. The reversal of 668013534247 is 742435310866.

668013534247 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 668013534247 - 2³ = 668013534239 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 668013534247.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (668013534047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334006767123 + 334006767124.

It is an arithmetic number, because the mean of its divisors is an integer number (334006767124).

Almost surely, 2^668013534247 is an apocalyptic number.

668013534247 is a deficient number, since it is larger than the sum of its proper divisors (1).

668013534247 is an equidigital number, since it uses as much as digits as its factorization.

668013534247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2903040, while the sum is 49.

The spelling of 668013534247 in words is "six hundred sixty-eight billion, thirteen million, five hundred thirty-four thousand, two hundred forty-seven".