40660143 has 4 divisors (see below), whose sum is σ = 54213528. Its totient is φ = 27106760.

The previous prime is 40660129. The next prime is 40660181. The reversal of 40660143 is 34106604.

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

It is a cyclic number.

It is not a de Polignac number, because 40660143 - 2⁵ = 40660111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40660183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6776688 + ... + 6776693.

It is an arithmetic number, because the mean of its divisors is an integer number (13553382).

Almost surely, 2^40660143 is an apocalyptic number.

40660143 is a deficient number, since it is larger than the sum of its proper divisors (13553385).

40660143 is a wasteful number, since it uses less digits than its factorization.

40660143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13553384.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 40660143 is about 6376.5306397758. The cubic root of 40660143 is about 343.8663144455.

Adding to 40660143 its reverse (34106604), we get a palindrome (74766747).

The spelling of 40660143 in words is "forty million, six hundred sixty thousand, one hundred forty-three".