66905341 has 2 divisors, whose sum is σ = 66905342. Its totient is φ = 66905340.

The previous prime is 66905323. The next prime is 66905381. The reversal of 66905341 is 14350966.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61936900 + 4968441 = 7870^2 + 2229^2 .

It is a cyclic number.

It is not a de Polignac number, because 66905341 - 2¹⁵ = 66872573 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66905297 and 66905306.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66905381) 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, 33452670 + 33452671.

It is an arithmetic number, because the mean of its divisors is an integer number (33452671).

Almost surely, 2^66905341 is an apocalyptic number.

It is an amenable number.

66905341 is a deficient number, since it is larger than the sum of its proper divisors (1).

66905341 is an equidigital number, since it uses as much as digits as its factorization.

66905341 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 66905341 is about 8179.5685094019. The cubic root of 66905341 is about 405.9634452274.

The spelling of 66905341 in words is "sixty-six million, nine hundred five thousand, three hundred forty-one".