40866613 has 2 divisors, whose sum is σ = 40866614. Its totient is φ = 40866612.

The previous prime is 40866601. The next prime is 40866647. The reversal of 40866613 is 31666804.

It is an a-pointer prime, because the next prime (40866647) can be obtained adding 40866613 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39652209 + 1214404 = 6297^2 + 1102^2 .

It is a cyclic number.

It is not a de Polignac number, because 40866613 - 2¹³ = 40858421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40866313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20433306 + 20433307.

It is an arithmetic number, because the mean of its divisors is an integer number (20433307).

Almost surely, 2^40866613 is an apocalyptic number.

It is an amenable number.

40866613 is a deficient number, since it is larger than the sum of its proper divisors (1).

40866613 is an equidigital number, since it uses as much as digits as its factorization.

40866613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 40866613 is about 6392.6999773179. The cubic root of 40866613 is about 344.4473768471.

The spelling of 40866613 in words is "forty million, eight hundred sixty-six thousand, six hundred thirteen".