668115061 has 2 divisors, whose sum is σ = 668115062. Its totient is φ = 668115060.

The previous prime is 668115047. The next prime is 668115073. The reversal of 668115061 is 160511866.

668115061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 633528900 + 34586161 = 25170^2 + 5881^2 .

It is a cyclic number.

It is not a de Polignac number, because 668115061 - 2⁵ = 668115029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (668115001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334057530 + 334057531.

It is an arithmetic number, because the mean of its divisors is an integer number (334057531).

Almost surely, 2^668115061 is an apocalyptic number.

It is an amenable number.

668115061 is a deficient number, since it is larger than the sum of its proper divisors (1).

668115061 is an equidigital number, since it uses as much as digits as its factorization.

668115061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 668115061 is about 25847.9217926703. The cubic root of 668115061 is about 874.2126516266.

The spelling of 668115061 in words is "six hundred sixty-eight million, one hundred fifteen thousand, sixty-one".