66538341 has 10 divisors (see below), whose sum is σ = 99396902. Its totient is φ = 44358840.

The previous prime is 66538313. The next prime is 66538363. The reversal of 66538341 is 14383566.

It can be written as a sum of positive squares in only one way, i.e., 66487716 + 50625 = 8154^2 + 225^2 .

It is not a de Polignac number, because 66538341 - 2²¹ = 64441189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66538296 and 66538305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66538141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 410650 + ... + 410811.

Almost surely, 2^66538341 is an apocalyptic number.

It is an amenable number.

66538341 is a deficient number, since it is larger than the sum of its proper divisors (32858561).

66538341 is an equidigital number, since it uses as much as digits as its factorization.

66538341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821473 (or 821464 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 66538341 is about 8157.1037139416. The cubic root of 66538341 is about 405.2197983867.

The spelling of 66538341 in words is "sixty-six million, five hundred thirty-eight thousand, three hundred forty-one".