66746673407328 has 96 divisors (see below), whose sum is σ = 189416235536640. Its totient is φ = 20508223956480.

The previous prime is 66746673407263. The next prime is 66746673407353. The reversal of 66746673407328 is 82370437664766.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 494440228 + ... + 494575203.

It is an arithmetic number, because the mean of its divisors is an integer number (1973085786840).

Almost surely, 2^{66746673407328} is an apocalyptic number.

It is an amenable number.

66746673407328 is an abundant number, since it is smaller than the sum of its proper divisors (122669562129312).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66746673407328 is a wasteful number, since it uses less digits than its factorization.

66746673407328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989015500 (or 989015492 counting only the distinct ones).

The product of its (nonzero) digits is 1024192512, while the sum is 69.

The spelling of 66746673407328 in words is "sixty-six trillion, seven hundred forty-six billion, six hundred seventy-three million, four hundred seven thousand, three hundred twenty-eight".