664786835043 has 32 divisors (see below), whose sum is σ = 934423179840. Its totient is φ = 419756413440.

The previous prime is 664786835033. The next prime is 664786835047. The reversal of 664786835043 is 340538687466.

It is not a de Polignac number, because 664786835043 - 2¹⁸ = 664786572899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (664786835047) 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 31 ways as a sum of consecutive naturals, for example, 33802633 + ... + 33822293.

It is an arithmetic number, because the mean of its divisors is an integer number (29200724370).

Almost surely, 2^664786835043 is an apocalyptic number.

664786835043 is a deficient number, since it is larger than the sum of its proper divisors (269636344797).

664786835043 is a wasteful number, since it uses less digits than its factorization.

664786835043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27079.

The product of its (nonzero) digits is 69672960, while the sum is 60.

The spelling of 664786835043 in words is "six hundred sixty-four billion, seven hundred eighty-six million, eight hundred thirty-five thousand, forty-three".