40166481 has 8 divisors (see below), whose sum is σ = 53587840. Its totient is φ = 26761392.

The previous prime is 40166459. The next prime is 40166509. The reversal of 40166481 is 18466104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40166481 - 2⁵ = 40166449 is a prime.

It is a super-2 number, since 2×40166481² = 3226692391846722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40166411) 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 7 ways as a sum of consecutive naturals, for example, 3960 + ... + 9798.

It is an arithmetic number, because the mean of its divisors is an integer number (6698480).

Almost surely, 2^40166481 is an apocalyptic number.

It is an amenable number.

40166481 is a deficient number, since it is larger than the sum of its proper divisors (13421359).

40166481 is a wasteful number, since it uses less digits than its factorization.

40166481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8135.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 40166481 is about 6337.7031328392. The cubic root of 40166481 is about 342.4689967852.

The spelling of 40166481 in words is "forty million, one hundred sixty-six thousand, four hundred eighty-one".