67148881816646 has 32 divisors (see below), whose sum is σ = 116750942120448. Its totient is φ = 28368568831680.

The previous prime is 67148881816631. The next prime is 67148881816663. The reversal of 67148881816646 is 64661818884176.

67148881816646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1728026 + ... + 11716818.

It is an arithmetic number, because the mean of its divisors is an integer number (3648466941264).

Almost surely, 2^{67148881816646} is an apocalyptic number.

67148881816646 is a deficient number, since it is larger than the sum of its proper divisors (49602060303802).

67148881816646 is a wasteful number, since it uses less digits than its factorization.

67148881816646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9995636.

The product of its digits is 594542592, while the sum is 74.

The spelling of 67148881816646 in words is "sixty-seven trillion, one hundred forty-eight billion, eight hundred eighty-one million, eight hundred sixteen thousand, six hundred forty-six".