666234061 has 2 divisors, whose sum is σ = 666234062. Its totient is φ = 666234060.

The previous prime is 666234047. The next prime is 666234073. The reversal of 666234061 is 160432666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 655872100 + 10361961 = 25610^2 + 3219^2 .

It is a cyclic number.

It is not a de Polignac number, because 666234061 - 2⁷ = 666233933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (666234001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333117030 + 333117031.

It is an arithmetic number, because the mean of its divisors is an integer number (333117031).

Almost surely, 2^666234061 is an apocalyptic number.

It is an amenable number.

666234061 is a deficient number, since it is larger than the sum of its proper divisors (1).

666234061 is an equidigital number, since it uses as much as digits as its factorization.

666234061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 666234061 is about 25811.5102425255. The cubic root of 666234061 is about 873.3914659198.

The spelling of 666234061 in words is "six hundred sixty-six million, two hundred thirty-four thousand, sixty-one".