40165663 has 8 divisors (see below), whose sum is σ = 40707632. Its totient is φ = 39626496.

The previous prime is 40165651. The next prime is 40165673. The reversal of 40165663 is 36656104.

40165663 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40165663 is a prime.

It is a super-2 number, since 2×40165663² = 3226560968459138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40165603) 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, 52681 + ... + 53437.

It is an arithmetic number, because the mean of its divisors is an integer number (5088454).

Almost surely, 2^40165663 is an apocalyptic number.

40165663 is a deficient number, since it is larger than the sum of its proper divisors (541969).

40165663 is an equidigital number, since it uses as much as digits as its factorization.

40165663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1401.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 40165663 is about 6337.6385980900. The cubic root of 40165663 is about 342.4666719484.

The spelling of 40165663 in words is "forty million, one hundred sixty-five thousand, six hundred sixty-three".