40406166 has 12 divisors (see below), whose sum is σ = 87546732. Its totient is φ = 13468716.

The previous prime is 40406153. The next prime is 40406167. The reversal of 40406166 is 66160404.

40406166 is a `hidden beast` number, since 4 + 0 + 40 + 616 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40406167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1122376 + ... + 1122411.

It is an arithmetic number, because the mean of its divisors is an integer number (7295561).

Almost surely, 2^40406166 is an apocalyptic number.

40406166 is an abundant number, since it is smaller than the sum of its proper divisors (47140566).

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

40406166 is a wasteful number, since it uses less digits than its factorization.

40406166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2244795 (or 2244792 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 40406166 is about 6356.5844602270. The cubic root of 40406166 is about 343.1488501044.

The spelling of 40406166 in words is "forty million, four hundred six thousand, one hundred sixty-six".