40166727866 has 32 divisors (see below), whose sum is σ = 64517841360. Its totient is φ = 18687983616.

The previous prime is 40166727859. The next prime is 40166727899. The reversal of 40166727866 is 66872766104.

40166727866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 29116303225 + 11050424641 = 170635^2 + 105121^2 .

It is a super-2 number, since 2×40166727866² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3519866 + ... + 3531258.

Almost surely, 2^40166727866 is an apocalyptic number.

40166727866 is a deficient number, since it is larger than the sum of its proper divisors (24351113494).

40166727866 is a wasteful number, since it uses less digits than its factorization.

40166727866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12578.

The product of its (nonzero) digits is 4064256, while the sum is 53.

The spelling of 40166727866 in words is "forty billion, one hundred sixty-six million, seven hundred twenty-seven thousand, eight hundred sixty-six".