66874168331398 has 16 divisors (see below), whose sum is σ = 102377197615680. Its totient is φ = 32754011893416.

The previous prime is 66874168331353. The next prime is 66874168331417. The reversal of 66874168331398 is 89313386147866.

It is a self number, because there is not a number n which added to its sum of digits gives 66874168331398.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1394001036 + ... + 1394049007.

It is an arithmetic number, because the mean of its divisors is an integer number (6398574850980).

Almost surely, 2^{66874168331398} is an apocalyptic number.

66874168331398 is a deficient number, since it is larger than the sum of its proper divisors (35503029284282).

66874168331398 is a wasteful number, since it uses less digits than its factorization.

66874168331398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2788050291.

The product of its digits is 752467968, while the sum is 73.

The spelling of 66874168331398 in words is "sixty-six trillion, eight hundred seventy-four billion, one hundred sixty-eight million, three hundred thirty-one thousand, three hundred ninety-eight".