40065601 has 2 divisors, whose sum is σ = 40065602. Its totient is φ = 40065600.

The previous prime is 40065587. The next prime is 40065629. The reversal of 40065601 is 10656004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39942400 + 123201 = 6320^2 + 351^2 .

It is a cyclic number.

It is not a de Polignac number, because 40065601 - 2¹⁷ = 39934529 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40065631) 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 as a sum of consecutive naturals, namely, 20032800 + 20032801.

It is an arithmetic number, because the mean of its divisors is an integer number (20032801).

Almost surely, 2^40065601 is an apocalyptic number.

It is an amenable number.

40065601 is a deficient number, since it is larger than the sum of its proper divisors (1).

40065601 is an equidigital number, since it uses as much as digits as its factorization.

40065601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 40065601 is about 6329.7394101179. The cubic root of 40065601 is about 342.1820474420.

The spelling of 40065601 in words is "forty million, sixty-five thousand, six hundred one".