40166565616 has 40 divisors (see below), whose sum is σ = 78284543040. Its totient is φ = 19964399616.

The previous prime is 40166565589. The next prime is 40166565617. The reversal of 40166565616 is 61656566104.

It is a super-2 number, since 2×40166565616² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40166565617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2258776 + ... + 2276488.

It is an arithmetic number, because the mean of its divisors is an integer number (1957113576).

Almost surely, 2^40166565616 is an apocalyptic number.

It is an amenable number.

40166565616 is a deficient number, since it is larger than the sum of its proper divisors (38117977424).

40166565616 is a wasteful number, since it uses less digits than its factorization.

40166565616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18553 (or 18547 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 46.

The spelling of 40166565616 in words is "forty billion, one hundred sixty-six million, five hundred sixty-five thousand, six hundred sixteen".