40664261630605 has 16 divisors (see below), whose sum is σ = 49419066977280. Its totient is φ = 32116845091968.

The previous prime is 40664261630567. The next prime is 40664261630609. The reversal of 40664261630605 is 50603616246604.

It is a cyclic number.

It is not a de Polignac number, because 40664261630605 - 2²⁷ = 40664127412877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40664261630609) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139164 + ... + 9019306.

It is an arithmetic number, because the mean of its divisors is an integer number (3088691686080).

Almost surely, 2^{40664261630605} is an apocalyptic number.

It is an amenable number.

40664261630605 is a deficient number, since it is larger than the sum of its proper divisors (8754805346675).

40664261630605 is a wasteful number, since it uses less digits than its factorization.

40664261630605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8891820.

The product of its (nonzero) digits is 3732480, while the sum is 49.

The spelling of 40664261630605 in words is "forty trillion, six hundred sixty-four billion, two hundred sixty-one million, six hundred thirty thousand, six hundred five".