40668385787 has 2 divisors, whose sum is σ = 40668385788. Its totient is φ = 40668385786.

The previous prime is 40668385717. The next prime is 40668385837. The reversal of 40668385787 is 78758386604.

40668385787 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40668385787 - 2³² = 36373418491 is a prime.

It is not a weakly prime, because it can be changed into another prime (40668385717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20334192893 + 20334192894.

It is an arithmetic number, because the mean of its divisors is an integer number (20334192894).

Almost surely, 2^40668385787 is an apocalyptic number.

40668385787 is a deficient number, since it is larger than the sum of its proper divisors (1).

40668385787 is an equidigital number, since it uses as much as digits as its factorization.

40668385787 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54190080, while the sum is 62.

The spelling of 40668385787 in words is "forty billion, six hundred sixty-eight million, three hundred eighty-five thousand, seven hundred eighty-seven".