66868700 has 18 divisors (see below), whose sum is σ = 145105296. Its totient is φ = 26747440.

The previous prime is 66868699. The next prime is 66868717. The reversal of 66868700 is 786866.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 334244 + ... + 334443.

Almost surely, 2^66868700 is an apocalyptic number.

It is an amenable number.

66868700 is an abundant number, since it is smaller than the sum of its proper divisors (78236596).

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

66868700 is a wasteful number, since it uses less digits than its factorization.

66868700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668701 (or 668694 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 66868700 is about 8177.3284145863. The cubic root of 66868700 is about 405.8893224810.

The spelling of 66868700 in words is "sixty-six million, eight hundred sixty-eight thousand, seven hundred".