40663811 has 2 divisors, whose sum is σ = 40663812. Its totient is φ = 40663810.

The previous prime is 40663807. The next prime is 40663837. The reversal of 40663811 is 11836604.

40663811 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 is a cyclic number.

It is not a de Polignac number, because 40663811 - 2² = 40663807 is a prime.

It is not a weakly prime, because it can be changed into another prime (40663871) 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, 20331905 + 20331906.

It is an arithmetic number, because the mean of its divisors is an integer number (20331906).

Almost surely, 2^40663811 is an apocalyptic number.

40663811 is a deficient number, since it is larger than the sum of its proper divisors (1).

40663811 is an equidigital number, since it uses as much as digits as its factorization.

40663811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 40663811 is about 6376.8182505071. The cubic root of 40663811 is about 343.8766543314.

The spelling of 40663811 in words is "forty million, six hundred sixty-three thousand, eight hundred eleven".