40816660 has 24 divisors (see below), whose sum is σ = 90757800. Its totient is φ = 15366144.

The previous prime is 40816649. The next prime is 40816669. The reversal of 40816660 is 6661804.

It can be written as a sum of positive squares in 4 ways, for example, as 19766916 + 21049744 = 4446^2 + 4588^2 .

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40816669) 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, 59685 + ... + 60364.

It is an arithmetic number, because the mean of its divisors is an integer number (3781575).

Almost surely, 2^40816660 is an apocalyptic number.

It is an amenable number.

40816660 is an abundant number, since it is smaller than the sum of its proper divisors (49941140).

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

40816660 is a wasteful number, since it uses less digits than its factorization.

40816660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120075 (or 120073 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 40816660 is about 6388.7917480538. The cubic root of 40816660 is about 344.3069753969.

The spelling of 40816660 in words is "forty million, eight hundred sixteen thousand, six hundred sixty".