66055061 has 2 divisors, whose sum is σ = 66055062. Its totient is φ = 66055060.

The previous prime is 66055051. The next prime is 66055097. The reversal of 66055061 is 16055066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65918161 + 136900 = 8119^2 + 370^2 .

It is a cyclic number.

It is not a de Polignac number, because 66055061 - 2⁶ = 66054997 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66055021) 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, 33027530 + 33027531.

It is an arithmetic number, because the mean of its divisors is an integer number (33027531).

Almost surely, 2^66055061 is an apocalyptic number.

It is an amenable number.

66055061 is a deficient number, since it is larger than the sum of its proper divisors (1).

66055061 is an equidigital number, since it uses as much as digits as its factorization.

66055061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 66055061 is about 8127.4264684462. The cubic root of 66055061 is about 404.2363519952.

The spelling of 66055061 in words is "sixty-six million, fifty-five thousand, sixty-one".