40663636 has 24 divisors (see below), whose sum is σ = 78508584. Its totient is φ = 18309120.

The previous prime is 40663633. The next prime is 40663639. The reversal of 40663636 is 63636604.

40663636 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (40663633) and next prime (40663639).

It can be written as a sum of positive squares in 4 ways, for example, as 6791236 + 33872400 = 2606^2 + 5820^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40663631) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 7405 + ... + 11668.

It is an arithmetic number, because the mean of its divisors is an integer number (3271191).

Almost surely, 2^40663636 is an apocalyptic number.

It is an amenable number.

40663636 is a deficient number, since it is larger than the sum of its proper divisors (37844948).

40663636 is a wasteful number, since it uses less digits than its factorization.

40663636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19131 (or 19129 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 34.

The square root of 40663636 is about 6376.8045289157. The cubic root of 40663636 is about 343.8761610303.

The spelling of 40663636 in words is "forty million, six hundred sixty-three thousand, six hundred thirty-six".