40668385785 has 64 divisors (see below), whose sum is σ = 66505501440. Its totient is φ = 21217996800.

The previous prime is 40668385717. The next prime is 40668385787. The reversal of 40668385785 is 58758386604.

It is not a de Polignac number, because 40668385785 - 2⁷ = 40668385657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40668385787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 65912797 + ... + 65913413.

It is an arithmetic number, because the mean of its divisors is an integer number (1039148460).

Almost surely, 2^40668385785 is an apocalyptic number.

It is an amenable number.

40668385785 is a deficient number, since it is larger than the sum of its proper divisors (25837115655).

40668385785 is a wasteful number, since it uses less digits than its factorization.

40668385785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1178.

The product of its (nonzero) digits is 38707200, while the sum is 60.

The spelling of 40668385785 in words is "forty billion, six hundred sixty-eight million, three hundred eighty-five thousand, seven hundred eighty-five".