66958141 has 2 divisors, whose sum is σ = 66958142. Its totient is φ = 66958140.

The previous prime is 66958091. The next prime is 66958163. The reversal of 66958141 is 14185966.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52925625 + 14032516 = 7275^2 + 3746^2 .

It is a cyclic number.

It is not a de Polignac number, because 66958141 - 2¹⁹ = 66433853 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66958094 and 66958103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66950141) 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, 33479070 + 33479071.

It is an arithmetic number, because the mean of its divisors is an integer number (33479071).

Almost surely, 2^66958141 is an apocalyptic number.

It is an amenable number.

66958141 is a deficient number, since it is larger than the sum of its proper divisors (1).

66958141 is an equidigital number, since it uses as much as digits as its factorization.

66958141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 40.

The square root of 66958141 is about 8182.7954269919. The cubic root of 66958141 is about 406.0702091690.

The spelling of 66958141 in words is "sixty-six million, nine hundred fifty-eight thousand, one hundred forty-one".