40664666006642 has 8 divisors (see below), whose sum is σ = 63100343803500. Its totient is φ = 19631218072144.

The previous prime is 40664666006623. The next prime is 40664666006669. The reversal of 40664666006642 is 24660066646604.

It can be written as a sum of positive squares in 2 ways, for example, as 37306796669041 + 3357869337601 = 6107929^2 + 1832449^2 .

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

It is a super-2 number, since 2×40664666006642² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 350557465517 + ... + 350557465632.

Almost surely, 2^{40664666006642} is an apocalyptic number.

40664666006642 is a deficient number, since it is larger than the sum of its proper divisors (22435677796858).

40664666006642 is a wasteful number, since it uses less digits than its factorization.

40664666006642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701114931180.

The product of its (nonzero) digits is 35831808, while the sum is 56.

The spelling of 40664666006642 in words is "forty trillion, six hundred sixty-four billion, six hundred sixty-six million, six thousand, six hundred forty-two".