41666389 has 2 divisors, whose sum is σ = 41666390. Its totient is φ = 41666388.

The previous prime is 41666357. The next prime is 41666437. The reversal of 41666389 is 98366614.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41344900 + 321489 = 6430^2 + 567^2 .

It is a cyclic number.

It is not a de Polignac number, because 41666389 - 2⁵ = 41666357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (41666309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20833194 + 20833195.

It is an arithmetic number, because the mean of its divisors is an integer number (20833195).

Almost surely, 2^41666389 is an apocalyptic number.

It is an amenable number.

41666389 is a deficient number, since it is larger than the sum of its proper divisors (1).

41666389 is an equidigital number, since it uses as much as digits as its factorization.

41666389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 43.

The square root of 41666389 is about 6454.9507356757. The cubic root of 41666389 is about 346.6798670804.

The spelling of 41666389 in words is "forty-one million, six hundred sixty-six thousand, three hundred eighty-nine".