40663565 has 4 divisors (see below), whose sum is σ = 48796284. Its totient is φ = 32530848.

The previous prime is 40663559. The next prime is 40663577. The reversal of 40663565 is 56536604.

40663565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30791401 + 9872164 = 5549^2 + 3142^2 .

It is a cyclic number.

It is not a de Polignac number, because 40663565 - 2⁴ = 40663549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4066352 + ... + 4066361.

It is an arithmetic number, because the mean of its divisors is an integer number (12199071).

Almost surely, 2^40663565 is an apocalyptic number.

It is an amenable number.

40663565 is a deficient number, since it is larger than the sum of its proper divisors (8132719).

40663565 is an equidigital number, since it uses as much as digits as its factorization.

40663565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8132718.

The product of its (nonzero) digits is 64800, while the sum is 35.

The square root of 40663565 is about 6376.7989618617. The cubic root of 40663565 is about 343.8759608906.

The spelling of 40663565 in words is "forty million, six hundred sixty-three thousand, five hundred sixty-five".