40663566 has 32 divisors (see below), whose sum is σ = 91389600. Its totient is φ = 13400640.

The previous prime is 40663559. The next prime is 40663577. The reversal of 40663566 is 66536604.

40663566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 40663566.

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 15 ways as a sum of consecutive naturals, for example, 576 + ... + 9036.

It is an arithmetic number, because the mean of its divisors is an integer number (2855925).

Almost surely, 2^40663566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40663566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45694800).

40663566 is an abundant number, since it is smaller than the sum of its proper divisors (50726034).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40663566 is a wasteful number, since it uses less digits than its factorization.

40663566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8561 (or 8555 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The square root of 40663566 is about 6376.7990402709. The cubic root of 40663566 is about 343.8759637095.

The spelling of 40663566 in words is "forty million, six hundred sixty-three thousand, five hundred sixty-six".