41666209 has 8 divisors (see below), whose sum is σ = 45966312. Its totient is φ = 37522560.

The previous prime is 41666189. The next prime is 41666227. The reversal of 41666209 is 90266614.

It can be written as a sum of positive squares in 4 ways, for example, as 1216609 + 40449600 = 1103^2 + 6360^2 .

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 41666209 - 2⁷ = 41666081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (41666309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38554 + ... + 39619.

It is an arithmetic number, because the mean of its divisors is an integer number (5745789).

Almost surely, 2^41666209 is an apocalyptic number.

It is an amenable number.

41666209 is a deficient number, since it is larger than the sum of its proper divisors (4300103).

41666209 is a wasteful number, since it uses less digits than its factorization.

41666209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78227.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 41666209 is about 6454.9367928741. The cubic root of 41666209 is about 346.6793678573.

The spelling of 41666209 in words is "forty-one million, six hundred sixty-six thousand, two hundred nine".