41666539 has 4 divisors (see below), whose sum is σ = 41711760. Its totient is φ = 41621320.

The previous prime is 41666497. The next prime is 41666557. The reversal of 41666539 is 93566614.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93566614 = 2 ⋅46783307.

It is a cyclic number.

It is not a de Polignac number, because 41666539 - 2¹⁹ = 41142251 is a prime.

It is a super-3 number, since 3×41666539³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (41666039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21199 + ... + 23080.

It is an arithmetic number, because the mean of its divisors is an integer number (10427940).

Almost surely, 2^41666539 is an apocalyptic number.

41666539 is a deficient number, since it is larger than the sum of its proper divisors (45221).

41666539 is an equidigital number, since it uses as much as digits as its factorization.

41666539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45220.

The product of its digits is 116640, while the sum is 40.

The square root of 41666539 is about 6454.9623546540. The cubic root of 41666539 is about 346.6802830985.

The spelling of 41666539 in words is "forty-one million, six hundred sixty-six thousand, five hundred thirty-nine".