40806681 has 8 divisors (see below), whose sum is σ = 57609504. Its totient is φ = 25604160.

The previous prime is 40806677. The next prime is 40806691. The reversal of 40806681 is 18660804.

40806681 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 not a de Polignac number, because 40806681 - 2² = 40806677 is a prime.

It is a super-2 number, since 2×40806681² = 3330370428471522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40806641) 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, 400015 + ... + 400116.

It is an arithmetic number, because the mean of its divisors is an integer number (7201188).

Almost surely, 2^40806681 is an apocalyptic number.

It is an amenable number.

40806681 is a deficient number, since it is larger than the sum of its proper divisors (16802823).

40806681 is a wasteful number, since it uses less digits than its factorization.

40806681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800151.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 40806681 is about 6388.0107232221. The cubic root of 40806681 is about 344.2789139848.

The spelling of 40806681 in words is "forty million, eight hundred six thousand, six hundred eighty-one".