66568655800 has 24 divisors (see below), whose sum is σ = 154772125200. Its totient is φ = 26627462240.

The previous prime is 66568655767. The next prime is 66568655819. The reversal of 66568655800 is 855686566.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 166421440 + ... + 166421839.

It is an arithmetic number, because the mean of its divisors is an integer number (6448838550).

Almost surely, 2^66568655800 is an apocalyptic number.

It is an amenable number.

66568655800 is an abundant number, since it is smaller than the sum of its proper divisors (88203469400).

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

66568655800 is a wasteful number, since it uses less digits than its factorization.

66568655800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332843295 (or 332843286 counting only the distinct ones).

The product of its (nonzero) digits is 10368000, while the sum is 55.

The spelling of 66568655800 in words is "sixty-six billion, five hundred sixty-eight million, six hundred fifty-five thousand, eight hundred".