40130665 has 4 divisors (see below), whose sum is σ = 48156804. Its totient is φ = 32104528.

The previous prime is 40130663. The next prime is 40130719. The reversal of 40130665 is 56603104.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18003049 + 22127616 = 4243^2 + 4704^2 .

It is a cyclic number.

It is not a de Polignac number, because 40130665 - 2¹ = 40130663 is a prime.

It is a super-2 number, since 2×40130665² = 3220940546684450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40130663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4013062 + ... + 4013071.

It is an arithmetic number, because the mean of its divisors is an integer number (12039201).

Almost surely, 2^40130665 is an apocalyptic number.

It is an amenable number.

40130665 is a deficient number, since it is larger than the sum of its proper divisors (8026139).

40130665 is an equidigital number, since it uses as much as digits as its factorization.

40130665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8026138.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 40130665 is about 6334.8768733102. The cubic root of 40130665 is about 342.3671745952.

Adding to 40130665 its reverse (56603104), we get a palindrome (96733769).

The spelling of 40130665 in words is "forty million, one hundred thirty thousand, six hundred sixty-five".