41666521 has 8 divisors (see below), whose sum is σ = 45041024. Its totient is φ = 38316240.

The previous prime is 41666497. The next prime is 41666557. The reversal of 41666521 is 12566614.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 41666521 - 2⁵ = 41666489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (41666621) 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 7 ways as a sum of consecutive naturals, for example, 2391 + ... + 9436.

It is an arithmetic number, because the mean of its divisors is an integer number (5630128).

Almost surely, 2^41666521 is an apocalyptic number.

It is an amenable number.

41666521 is a deficient number, since it is larger than the sum of its proper divisors (3374503).

41666521 is a wasteful number, since it uses less digits than its factorization.

41666521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12111.

The product of its digits is 8640, while the sum is 31.

The square root of 41666521 is about 6454.9609603777. The cubic root of 41666521 is about 346.6802331763.

The spelling of 41666521 in words is "forty-one million, six hundred sixty-six thousand, five hundred twenty-one".