40666549 has 8 divisors (see below), whose sum is σ = 50701248. Its totient is φ = 31688160.

The previous prime is 40666541. The next prime is 40666559. The reversal of 40666549 is 94566604.

40666549 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 40666549 - 2³ = 40666541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40666541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 263992 + ... + 264145.

It is an arithmetic number, because the mean of its divisors is an integer number (6337656).

Almost surely, 2^40666549 is an apocalyptic number.

It is an amenable number.

40666549 is a deficient number, since it is larger than the sum of its proper divisors (10034699).

40666549 is a wasteful number, since it uses less digits than its factorization.

40666549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528155.

The product of its (nonzero) digits is 155520, while the sum is 40.

The square root of 40666549 is about 6377.0329307602. The cubic root of 40666549 is about 343.8843721942.

The spelling of 40666549 in words is "forty million, six hundred sixty-six thousand, five hundred forty-nine".