66866934800 has 30 divisors (see below), whose sum is σ = 160647811818. Its totient is φ = 26746773760.

The previous prime is 66866934791. The next prime is 66866934811. The reversal of 66866934800 is 843966866.

It can be written as a sum of positive squares in 3 ways, for example, as 286421776 + 66580513024 = 16924^2 + 258032^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 83583269 + ... + 83584068.

Almost surely, 2^66866934800 is an apocalyptic number.

It is an amenable number.

66866934800 is an abundant number, since it is smaller than the sum of its proper divisors (93780877018).

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

66866934800 is a wasteful number, since it uses less digits than its factorization.

66866934800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167167355 (or 167167344 counting only the distinct ones).

The product of its (nonzero) digits is 8957952, while the sum is 56.

The spelling of 66866934800 in words is "sixty-six billion, eight hundred sixty-six million, nine hundred thirty-four thousand, eight hundred".