40407036666 has 16 divisors (see below), whose sum is σ = 80892318144. Its totient is φ = 13455971424.

The previous prime is 40407036623. The next prime is 40407036671. The reversal of 40407036666 is 66663070404.

It is a super-2 number, since 2×40407036666² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3253486 + ... + 3265881.

It is an arithmetic number, because the mean of its divisors is an integer number (5055769884).

Almost surely, 2^40407036666 is an apocalyptic number.

40407036666 is an abundant number, since it is smaller than the sum of its proper divisors (40485281478).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40407036666 is a wasteful number, since it uses less digits than its factorization.

40407036666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6520405.

The product of its (nonzero) digits is 435456, while the sum is 42.

The spelling of 40407036666 in words is "forty billion, four hundred seven million, thirty-six thousand, six hundred sixty-six".