40665144 has 32 divisors (see below), whose sum is σ = 109483920. Its totient is φ = 12512256.

The previous prime is 40665091. The next prime is 40665167. The reversal of 40665144 is 44156604.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64857 + ... + 65480.

Almost surely, 2^40665144 is an apocalyptic number.

It is an amenable number.

40665144 is an abundant number, since it is smaller than the sum of its proper divisors (68818776).

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

40665144 is a wasteful number, since it uses less digits than its factorization.

40665144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130359 (or 130355 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 40665144 is about 6376.9227688596. The cubic root of 40665144 is about 343.8804118294.

The spelling of 40665144 in words is "forty million, six hundred sixty-five thousand, one hundred forty-four".