40006666677401 has 4 divisors (see below), whose sum is σ = 40006722082404. Its totient is φ = 40006611272400.

The previous prime is 40006666677391. The next prime is 40006666677409. The reversal of 40006666677401 is 10477666660004.

40006666677401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 28517949648400 + 11488717029001 = 5340220^2 + 3389501^2 .

It is a cyclic number.

It is not a de Polignac number, because 40006666677401 - 2¹⁰ = 40006666676377 is a prime.

It is a super-2 number, since 2×40006666677401² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40006666677409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26604890 + ... + 28068371.

It is an arithmetic number, because the mean of its divisors is an integer number (10001680520601).

Almost surely, 2^{40006666677401} is an apocalyptic number.

It is an amenable number.

40006666677401 is a deficient number, since it is larger than the sum of its proper divisors (55405003).

40006666677401 is an equidigital number, since it uses as much as digits as its factorization.

40006666677401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55405002.

The product of its (nonzero) digits is 6096384, while the sum is 53.

The spelling of 40006666677401 in words is "forty trillion, six billion, six hundred sixty-six million, six hundred seventy-seven thousand, four hundred one".