40065663 has 16 divisors (see below), whose sum is σ = 58582656. Its totient is φ = 24155040.

The previous prime is 40065659. The next prime is 40065679. The reversal of 40065663 is 36656004.

It is not a de Polignac number, because 40065663 - 2² = 40065659 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40065663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40065763) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3420 + ... + 9582.

It is an arithmetic number, because the mean of its divisors is an integer number (3661416).

Almost surely, 2^40065663 is an apocalyptic number.

40065663 is a deficient number, since it is larger than the sum of its proper divisors (18516993).

40065663 is a wasteful number, since it uses less digits than its factorization.

40065663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6374.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 40065663 is about 6329.7443076320. The cubic root of 40065663 is about 342.1822239465.

It can be divided in two parts, 4006 and 5663, that added together give a palindrome (9669).

The spelling of 40065663 in words is "forty million, sixty-five thousand, six hundred sixty-three".