40336666729 has 2 divisors, whose sum is σ = 40336666730. Its totient is φ = 40336666728.

The previous prime is 40336666639. The next prime is 40336666739. The reversal of 40336666729 is 92766663304.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38864179600 + 1472487129 = 197140^2 + 38373^2 .

It is a cyclic number.

It is not a de Polignac number, because 40336666729 - 2⁹ = 40336666217 is a prime.

It is not a weakly prime, because it can be changed into another prime (40336666739) 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, 20168333364 + 20168333365.

It is an arithmetic number, because the mean of its divisors is an integer number (20168333365).

Almost surely, 2^40336666729 is an apocalyptic number.

It is an amenable number.

40336666729 is a deficient number, since it is larger than the sum of its proper divisors (1).

40336666729 is an equidigital number, since it uses as much as digits as its factorization.

40336666729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5878656, while the sum is 52.

The spelling of 40336666729 in words is "forty billion, three hundred thirty-six million, six hundred sixty-six thousand, seven hundred twenty-nine".