66070061 has 2 divisors, whose sum is σ = 66070062. Its totient is φ = 66070060.

The previous prime is 66070051. The next prime is 66070079. The reversal of 66070061 is 16007066.

66070061 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 can be written as a sum of positive squares in only one way, i.e., 64096036 + 1974025 = 8006^2 + 1405^2 .

It is a cyclic number.

It is not a de Polignac number, because 66070061 - 2²² = 61875757 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66070061.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66070051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33035030 + 33035031.

It is an arithmetic number, because the mean of its divisors is an integer number (33035031).

Almost surely, 2^66070061 is an apocalyptic number.

It is an amenable number.

66070061 is a deficient number, since it is larger than the sum of its proper divisors (1).

66070061 is an equidigital number, since it uses as much as digits as its factorization.

66070061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 66070061 is about 8128.3492173996. The cubic root of 66070061 is about 404.2669481184.

The spelling of 66070061 in words is "sixty-six million, seventy thousand, sixty-one".