40665216 has 32 divisors (see below), whose sum is σ = 108018000. Its totient is φ = 13554944.

The previous prime is 40665203. The next prime is 40665227. The reversal of 40665216 is 61256604.

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52566 + ... + 53333.

Almost surely, 2^40665216 is an apocalyptic number.

It is an amenable number.

40665216 is an abundant number, since it is smaller than the sum of its proper divisors (67352784).

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

40665216 is a wasteful number, since it uses less digits than its factorization.

40665216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105916 (or 105904 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 40665216 is about 6376.9284142132. The cubic root of 40665216 is about 343.8806147827.

The spelling of 40665216 in words is "forty million, six hundred sixty-five thousand, two hundred sixteen".