40166794868 has 24 divisors (see below), whose sum is σ = 72727298280. Its totient is φ = 19387786880.

The previous prime is 40166794861. The next prime is 40166794919. The reversal of 40166794868 is 86849766104.

It can be written as a sum of positive squares in 4 ways, for example, as 724040464 + 39442754404 = 26908^2 + 198602^2 .

It is a super-2 number, since 2×40166794868² (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 (40166794861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 817478 + ... + 865218.

It is an arithmetic number, because the mean of its divisors is an integer number (3030304095).

Almost surely, 2^40166794868 is an apocalyptic number.

It is an amenable number.

40166794868 is a deficient number, since it is larger than the sum of its proper divisors (32560503412).

40166794868 is a wasteful number, since it uses less digits than its factorization.

40166794868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55027 (or 55025 counting only the distinct ones).

The product of its (nonzero) digits is 13934592, while the sum is 59.

The spelling of 40166794868 in words is "forty billion, one hundred sixty-six million, seven hundred ninety-four thousand, eight hundred sixty-eight".