40013320566 has 64 divisors (see below), whose sum is σ = 82267799040. Its totient is φ = 12969653760.

The previous prime is 40013320537. The next prime is 40013320603. The reversal of 40013320566 is 66502331004.

It is a Curzon number.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 37641351 + ... + 37642413.

It is an arithmetic number, because the mean of its divisors is an integer number (1285434360).

Almost surely, 2^40013320566 is an apocalyptic number.

40013320566 is an abundant number, since it is smaller than the sum of its proper divisors (42254478474).

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

40013320566 is a wasteful number, since it uses less digits than its factorization.

40013320566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2181.

The product of its (nonzero) digits is 12960, while the sum is 30.

The spelling of 40013320566 in words is "forty billion, thirteen million, three hundred twenty thousand, five hundred sixty-six".