66427845696 has 63 divisors (see below), whose sum is σ = 190421157511. Its totient is φ = 22140553344.

The previous prime is 66427845689. The next prime is 66427845713. The reversal of 66427845696 is 69654872466.

The square root of 66427845696 is 257736.

It is a perfect power (a square), and thus also a powerful number.

66427845696 is a `hidden beast` number, since 6 + 64 + 2 + 7 + 8 + 4 + 569 + 6 = 666.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6180295 + ... + 6191033.

Almost surely, 2^66427845696 is an apocalyptic number.

66427845696 is the 257736-th square number.

It is an amenable number.

66427845696 is an abundant number, since it is smaller than the sum of its proper divisors (123993311815).

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

66427845696 is an frugal number, since it uses more digits than its factorization.

66427845696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21496 (or 10744 counting only the distinct ones).

The product of its digits is 104509440, while the sum is 63.

The spelling of 66427845696 in words is "sixty-six billion, four hundred twenty-seven million, eight hundred forty-five thousand, six hundred ninety-six".