40066657 has 2 divisors, whose sum is σ = 40066658. Its totient is φ = 40066656.

The previous prime is 40066651. The next prime is 40066679. The reversal of 40066657 is 75666004.

40066657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30481441 + 9585216 = 5521^2 + 3096^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40066657 is a prime.

It is not a weakly prime, because it can be changed into another prime (40066651) 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 as a sum of consecutive naturals, namely, 20033328 + 20033329.

It is an arithmetic number, because the mean of its divisors is an integer number (20033329).

Almost surely, 2^40066657 is an apocalyptic number.

It is an amenable number.

40066657 is a deficient number, since it is larger than the sum of its proper divisors (1).

40066657 is an equidigital number, since it uses as much as digits as its factorization.

40066657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 40066657 is about 6329.8228253246. The cubic root of 40066657 is about 342.1850536873.

The spelling of 40066657 in words is "forty million, sixty-six thousand, six hundred fifty-seven".